Landa TRV-3500 User manual

®
8.917-470.0-R 01/07/20
Trailer
Hot Water - Diesel or Gas Powered -
Diesel/Oil Heated
Service Manual Pressure Washer
EPA
LabelforSafety
XXXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXX
EPA
LabelforSafety
XXXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXX
MODELS: TRV-3500
1.103-820.0
For the Landa Dealer nearest
you, consult our web page at
www.landa.com

2Landa TRV-3500 Service Manual 8.917-470.0 - R
Machine Data Label
Introduction
Thank you for purchasing this Pressure Washer. We reserve the right to make changes at any time
without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of the manufacturer’s operating instructions and warnings
before using this pressure washer. Warning information should be emphasized and understood. If the operator is
not fluent in English, the manufacturer’s instructions and warnings shall be read to and discussed with the operator
in the operator’s native language by the purchaser/owner, making sure that the operator comprehends its
contents. Owner and/or user must study and maintain for future reference the manufacturers’ instructions.
Save These Instructions
This manual should be considered a permanent part of the machine and should remain with it if machine is
resold. When ordering parts, please specify model and serial number. Use only identical replacement
parts.This machine is to be used only by trained operators.
Notice
This trailer is equipped to meet applicable U.S. Federal safety standards. Check local and state requirements
regarding brakes and any additional equipment that may be required. Any modifications
or additions including load-equalizing hitches, without written factory consent: usage in an abnormal
manner including overloading voids all manufacturers’ warranties and liability.
WARNING: This Owner's Manual contains safety information and instructions for your trailer.
You must read this manual before loading or towing your trailer.
You must follow all safety precautions and instructions.

3
Table of Contents
Machine Data Label . . . . . . . . . . . . . . . . . . . . . . . . . .2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Important Trailer Safety Information
Referencing the Utility Trailer in this Manual . . . . . . 4
Tire Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Basic Tire Maintenance . . . . . . . . . . . . . . . . . . . . . .4
Understanding Tire Pressure and Load Limits . . . . .4
Maintaining Proper Tire Pressure . . . . . . . . . . . . . . .4
Never Tow the Trailer Before Checking:. . . . . . . . . .5
Tow Vehicles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Trailer Ball & Couplers . . . . . . . . . . . . . . . . . . . . . . .6
Before Towing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Variable Height Bracket: . . . . . . . . . . . . . . . . . . . . . .6
Bolting Instructions:. . . . . . . . . . . . . . . . . . . . . . . . . .6
Hitch Coupler Troubleshooting . . . . . . . . . . . . . . . . .7
Coupler & Ball Engagement . . . . . . . . . . . . . . . . . . .7
Safety Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Load-Carrying Capacity . . . . . . . . . . . . . . . . . . . . . .8
Proper Weight Distribution & Tongue Weight . . . . . .8
Tongue Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Wheel Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
What to Check and How to Check
Wheel Torque Requirements
Ball Coupler Hitches . . . . . . . . . . . . . . . . . . . . . .10
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Maintenance
Breakaway Switch & D.O.T. Wet Cell Battery. . . . .11
Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Burnishing the Brakes. . . . . . . . . . . . . . . . . . . . . . .11
Reporting Safety Defects . . . . . . . . . . . . . . . . . . . .11
Preventative Maintenance . . . . . . . . . . . . . . . . . . . 12
Axles, Hubs and Brakes . . . . . . . . . . . . . . . . . . . . . 12
Parts
TRV-3500 Trailer . . . . . . . . . . . . . . . . . . . . . . . . . 14
TRV-3500 Trailer . . . . . . . . . . . . . . . . . . . . . . . . . 16
Trailer With PGHW Washer . . . . . . . . . . . . . . . . . 18
Trailer With PGDC Washer. . . . . . . . . . . . . . . . . . 20
Trailer With MHP Washer . . . . . . . . . . . . . . . . . . . 22
Trailer With MHC Washer . . . . . . . . . . . . . . . . . . . 24
Optional Hose Reel Low Pressure 8.917-555.0 . . 28
Wiring Diagram - Hydraulic Option . . . . . . . . . . . . 32
Landa TRV-3500 Service Manual 8.917-470.0 - R

4
Important Trailer Safety Information
Referencing the Utility Trailer in this
Manual
All references to the trailer or component parts to either
left or right are made with the assumption that you are
standing behind the trailer facing forward. Your left
hand or right hand is the equivalent on the trailer.
Tire Safety
The most common cause of trailer tire failure is under-
inflation. Therefore, it is important that you always
maintain the specified air pressure as indicated by the
tire manufacturer on the tire's side-walls. This informa-
tion can also be found on the tire label or the air
pressure molded on the tire side-wall.
The most important things you can do to maintaining
proper tire pressure are observe all tire and trailer
maximum carrying capacities, avoid road hazards, and
inspect the tires for cuts, slashes and other irregulari-
ties. These practices, along with other care and mainte-
nance, can improve handling, help protect you and
others from avoidable breakdowns and accidents,
improve fuel economy, and increase the life of your
tires.
Make tire safety a regular part of your trailer mainte-
nance routine. The time you spend is minimal
compared to the amount of time, inconvenience, and
potential safety hazards that can occur from a flat tire or
failure.
Basic Tire Maintenance
Properly maintained tires improve the load-carrying
capability of your trailer. You can help avoid flat tires
and tire failures by main-taining proper tire pressure,
observing tire and trailer capacity limits, avoiding road
hazards, and inspecting your tires regularly.
Identifying Your Recommended Tire
Pressure and Maximum Load Carrying
Capacity for Your Trailer
Both the tire placard and the VIN label are permanently
attached on top of the frame of your trailer and have the
required information printed on them. They also list the
maximum load that can be placed on the trailer without
exceeding the load limits of the tires or the trailers other
components. These labels indicate the manufacturer’s
information including:
• Recommended tire size.
• Recommended tire inflation pressure.
• The maximum weight the trailer is designed to
carry.
• Gross vehicle weight rating of the trailer.
• Gross axle weight rating of the trailer.
Understanding Tire Pressure and Load
Limits
Tire inflation pressure is the level of air in the tire that
provides it with the load-carrying capacity and affects
the overall performance of the trailer. The tire inflation
pressure is a number that indicates the amount of air
pressure that is inside the tire. It is measured in pounds
per square inch (PSI). The tire must be inflated to the
air pressure as designated on the labels. Also listed on
the labels is the air pressure in kilo Pascals (kPa),
which is a metric measurement. Tire manufacturers
determine the air pressure to maximize the amount of
weight the tires can safely carry. The proper tire
pressure for your trailer tires is referred to as the
"recommended cold inflation pressure." It is difficult to
obtain the recommended tire pressure if your tires are
not cold when the reading is taken because the air will
expand when it is warmed by towing down the road,
thus increasing the air pressure inside. If air is added to
a tire that is low the air pressure should never exceed
the recommended pressure.
It is important to check your trailer’s tire pressure at
least once a month for the following reasons:
Most tires will naturally lose air over time.
Tires can lose air suddenly if driven over an object that
punctures or cuts the tire. Sometimes a sharp blow
from a pothole or curb can knock the tire loose from the
rim causing immediate deflation.
Maintaining Proper Tire Pressure
Locate the recommended tire pressure on the trailer's
tire information placard or owner's manual.
Record the tire pressure of all tires. If the tire pressure
is too high in any of the tires, slowly release air by
gently pressing on the tire valve stem with the edge of
your tire gauge until you get the correct pressure.
If the tire pressure is too low, note the difference
between the measured tire pressure and the correct tire
pressure. These "missing" pounds of pressure are what
you will need to add.
Add the missing pounds of air pressure to each tire that
is under inflated.
Check all tires to make sure they have the same air
pressure.
Landa TRV-3500 Service Manual 8.917-470.0 - R

5
Important Trailer Safety Information
If you have been towing your trailer and think that a tire
is under inflated, fill it to the recommended cold inflation
pressure indicated on your trailer's tire label placard or
the VIN label. You can also check the sidewall of the
tire for a correct tire inflation pressure. Your tire will
have a slightly lower air pressure because the tire is
warm when you are inflating it, but it will be much better
than to continue to tow it with the under inflation it may
have had. Once the trailer has been parked long
enough to allow the tires to cool down, recheck the tire
pressure and add additional air to return the tire
pressure to the recommended level.
Tire Size
To maintain the trailer's carrying capacity and safety,
purchase only the same size tires as what were origi-
nally supplied on the trailer.
Safety Tips
Slow down if you have to go over a pothole or other
object in road.
Do not run over curbs and try not to strike the curb
when parking.
For a free brochure visit:
www.nhtsa.dot.gov
IMPORTANT: Before towing this trailer be sure to
read the instructions and warnings supplied in this
manual. Also read the information supplied with
your tow vehicle so you know and understand it's
limitations.
Never Tow the Trailer Before Checking:
• Coupler and latch assembly show no signs of
wear or damage.
• Coupler hitch and hitch ball are of the same
size.
• Coupler and safety chains are safely secured to
the hitch.
• Check all fasteners for proper tightness.
• Load is securely tied down to the trailer.
• Wheel lug nuts are properly tightened to the
right torque.
• Wheel bearings are properly adjusted and
maintained.
• Load is within the maximum load carrying
capacity of trailer.
• Tires are properly inflated and are road worthy.
• All trailer lighting is working properly.
• Tire pressure and tire condition
• Wheel lugs*
• Bearing lube and tightness
• Hitch
• Safety chains
• 12V running lights
• Distribution and security
• Caster up in travel position
* Check lug nuts for tightness before initial trip, at 10
miles, 25 miles and 50 miles. Recheck every 3 months
or 3000 miles.
NOTE: Checking all of the above steps before every
trip is key for safety.
IMPORTANT: The load must be distributed equally
on the bed of the trailer if possible. Heavy, concen-
trated loads may cause damage or possible failure
of the trailer.
WARNING: Loads place on the trailer must be
securely tied to the trailer. Always use appropriate
tie downs designed to restrict loads from moving
when properly attached. Failure to do so will allow
shifting of the load causing potential trailer failure
and/or loss of the load and personal injury.
This trailer is equipped to meet all applicable federal
safety standards in effect the day of manufacture.
Check local and state requirements regarding any addi-
tional equipment that may be required.
The addition of optional equipment to your trailer may
in- crease the total weight of your trailer package to
where it now exceeds the maximum load carrying
capacity of the trailer.
Tow Vehicles
WARNING: Serious injury or property damage can
result if the total weight of your loaded trailer
exceeds the capacity of the hitch and/or your tow
vehicle.
It is very important that you know and understand the
towing capabilities of your tow vehicle. This is espe-
cially true with the braking abilities of the tow vehicle.
You should check with your authorized dealer to see
what the capabilities are for the total towing load and
the maximum allowable tongue weight for the vehicle
you plan on using for towing.
It is also important that the lighting system in the tow
vehicle has sufficient capacity support the additional
load the trailer lighting will add to the system. A heavy
duty flasher may be required to make your turn signals
function properly.
Landa TRV-3500 Service Manual 8.917-470.0 - R

6
Important Trailer Safety Information
Trailer Ball & Couplers
WARNING: Failure to properly engage the hitch ball
in the coupler ball socket and securely lock the
coupler latch mechanism can cause the trailer to
become detached from the tow vehicle while trav-
eling, which may cause serious injury or property
damage.
Ball diameter for which rating (GVWR) shall not exceed
the gross trailer weight marked on the trailer coupler.
The hitch balls have the rated load they are capable of
towing stamped Into the top of the ball.
Make sure the ball that you use to tow your trailer has
the same capacity rating as the coupler.
Do not use a different size ball than the size the coupler
is designed to use.
Before Towing:
Check mounting bracket hardware for wear and proper
tightness. Replace bent, broken, or worn hardware.
Tighten hardware to 90-96 ft. lbs. Use only the
hardware provided with the Trailer. If replacement
hardware is needed, order replacement kit 8.924-
356.0.
Make sure that the trailer safety chains are properly
connected to the towing vehicle and trailer according to
SAE J684. See Safety Chain information in your
manual.
Make sure that all trailer lighting is hooked up and
working properly.
Warning: Failure to follow all installation instruc-
tions could result in coupler failure.
Variable Height Bracket:
Coupler operation must not be impaired in any way. Do
not use if coupler operation is impaired.
Bolting Instructions:
Align holes in coupler and mounting bracket. NOTE:
Coupler must be secured to mounting bracket using
two sets of holes in the mounting bracket. Insert two (2)
5/8”x4.5”, grade 5 bolts through desired mounting
bracket holes and coupler. For each bolt, Place one (1)
washer at the bolt head side and another at the bolt
thread side before assembling the nuts. Tighten lock
nuts to 90-96 ft. lbs. After installation, ensure coupler
operation is not impaired in any way. Do not use if
coupler operation is impaired. The hardware provided
with the trailer has a self-lubricating coating which is
taken into account for the tightening torque above, and
is lower than standard hardware and also is more
consistent with re-torque specifications to first-torque
than standard hardware. Order replacements with the
8.924-356.0 replacement kit, or consult your hardware
vendor for applicable, higher, torques for the applica-
tion.
Maintenance
Keep ball pocket and mechanism clean. The following
procedures should be performed at least annually:
Check set screw torque Grease ball pocket
Oil pivot points with SAE 30 wt. motor oil
Inspect retaining pin and replace if necessary
Operation
To Couple:
1. Block trailer wheels.
2. Align hitch ball beneath coupler.
3. Open coupler locking lever. While holding locking
lever open, lower the coupler over the hitch ball
until ball is fully seated into the ball pocket.
4. If locking lever is pinned open, remove pin. Move
locking lever to the closed position. Check that the
latch is engaged by lifting up on back of locking
lever. Also, check that the hitch ball is fully seated
and ball clamp is below the ball. If the ball is not
seated with lever in the closed position and latch
engaged, DO NOT TOW.
Repeat the above steps.
Class Coupler Ball Diameter
II 3,500# GVWR 2”
III 5,000# GVWR 2”
IV 8,000# GVWR 2 5/16"
Landa TRV-3500 Service Manual 8.917-470.0 - R

7
Important Trailer Safety Information
5. OPTIONAL: Place a 5/16” pin or lock in hole shown
To Uncouple:
1. Block trailer wheels.
2. Open locking lever. While holding locking lever fully
open, raise trailer off of hitch ball.
NOTE: A 5/16” diameter pin can be used to hold the
locking lever open.
Hitch Coupler Troubleshooting
If the coupler becomes damaged it must be repaired or
replaced before towing. When the coupler is placed on
the ball, the latch should close firmly. Keep the latch
mechanism lightly oiled and clean. Items to check for
are as follows:
1. Latch does not grasp ball securely:
• Check the ball size. Make sure the ball and
coupler are the same size.
2. Latch does not snap into full latch position:
• Check adjustment. Latch mechanism may be
too tight.
• Check to see that the coupler housing has not
been damaged, keeping the ball hitch from
fitting completely into the housing as designed.
3. Keep the tongue blocked up when not in use so the
coupler and mechanism are not in the ground
being exposed to dirt and moisture.
4. Apply a small amount of an automotive grease to
the ball before hitching coupler to prevent wear of
the two parts during towing.
5. Make sure the latch safety pin is in position before
towing.
Coupler & Ball Engagement
If the coupler and towing ball resist attempts to make
engagement, do not force latch assembly. Instead,
check the ball diameter to verify that it conforms to
Society of Automotive Engineers (SAE) specifications.
Standard two-inch diameter ball should be within the
limits of 2.000-inches to 1.970-inches. Balls larger than
2.000- inches will not readily fit the coupler. A two-piece
coupler ball is not recommended.
If the coupler becomes damaged it must be repaired or
replaced before towing. When the coupler is placed on
the ball, the latch should close firmly. Keep the latch
mechanism lightly oiled and clean. Improper engage-
ment of the coupler and ball can cause damage if the
vehicles separate in transit, thus, caution must be
exercised to insure a secure hook-up. Lower the
coupler onto the ball with the coupler latch in the
vertical position. Continue to lower the trailer tongue
until the jack clears the ground, then flip the coupler
latch to its locked (horizontal) position. At this point
visually observe that the ball is fully engaged in the ball
hitch. An even better check to make sure the two are
fully engaged is to raise the tongue of the trailer again
using the jack. Raise until the ball hitch connection
starts to raise the rear of the tow vehicle. If the connec-
tion was not properly made, the ball and socket will
separate as the tongue of the trailer is raised.
Safety Chains
Listed in the chart below are the different class sizes of
safety chains and the rated load each chain must be
capable of withstanding. Your trailer is equipped with
safety chains that meet the requirements of D.O.T
Regulation 393.70.
WARNING: Failure to properly attach safety chains
between the trailer and tow vehicle can result in a
runaway trailer.
WARNING: To avoid accidents, before trailering:
• Hitch only to ball size marked on coupling.
• Ball clamp must capture ball and lever or hand
wheel is fully clamped.
• Cross safety chains under coupling.
• Allow only enough slack for turns.
Trailer
Class
Trailer Weight
GVWR In Lbs.
Minimum Braking
Strength In Lbs.
I to 2,000 2,000
II 2,000 to 3,500 3,500
III 3,500 to 5,000 5,000
IV 5,000 to 7,000 7,600
Landa TRV-3500 Service Manual 8.917-470.0 - R
Bottom View

8
Important Trailer Safety Information
The safety chains on your trailer are an added
insurance that it will not become detached from the tow
vehicle. All safety chains are provided with an added
clasp to keep them from becoming accidentally
detached from the tow vehicle. Your trailer hitch on the
tow vehicle should have two attaching holes or rings for
attaching the safety chains, preferably one on each
side of the ball hitch. Crisscross the chains under the
tongue, the chain on the left side of the trailer tongue
attached to the right side of the ball hitch, the chain on
the right side of the trailer tongue attached to the left
side of the ball hitch.
This prevents the trailer tongue from dropping to the
road should the coupler or ball hitch fail. The chains
should be rigged as tight as possible with just enough
slack to allow tight turns to be made. This can be
accomplished by twisting the chain hook in a clockwise
or counterclockwise direction thus twisting the link
spacing and making the chain shorter. Also by keeping
your chains as short as possible you prevent them from
dragging on the road and wearing the chain links. If for
any reason you find it necessary to replace a safety
chain, use only original equipment.
Load-Carrying Capacity
Located on the front left-hand side of the frame, (either
the inside or the outside) is the VIN (Vehicle Identifica-
tion Number) tag. It will show the GVWR (Gross Vehicle
Weight Rating) which is the maximum load that can be
applied to the tires on the trailer. The GVWR and the
carrying capacity of the trailer are based on the tire size
installed on the trailer.
The GVWR is the maximum carrying capacity of the
trailer with its respective tires. It may not necessarily
equal the total GVWR of the trailer less the empty
weight of the trailer because there may be another
controlling factor such as frame strength that reduces
the carrying capacity to what is listed on the VIN tag.
The tire label will list the tire size that was installed on
the trailer as original equipment when it was sold to
you, the consumer. It also lists the maximum carrying
capacity of the trailer.
IMPORTANT: The total weight of the load must
never exceed the weight of cargo listed on the tire
label and/or the maximum load carrying capacity
listed on the VIN tag on your trailer. The GVWR
(Gross Vehicle Weight Rating) listed is the
maximum total weight of the trailer with accesso-
ries and all cargo allowable to be carried on the
tires that are installed on the trailer.
WARNING: Fishtailing caused from improper
tongue weight on the tow vehicle hitch ball can
cause loss of control of the tow vehicle and
resulting serious injury or property damage.
CAUTION: The maximum load applied to the trailer
must never exceed the carrying capacity of the
trailer as stated on the VIN label and/or the tire
placard. Doing so may cause failure of one or more
component parts of the trailer causing potential
damage to the trailer and/ or a potential accident.
All concentrated loads must be spread over as
large an area as possible to eliminate potential
damage to the decking.
Shown below is an example of the tire label that is
placed on your trailer showing the items just discussed
above. Once you have familiarized yourself with the
information supplied on the example tire label and VIN
tag, check the tire size and capacity of your trailer as
shown on the VIN tag on your trailer.
Proper Weight Distribution & Tongue
Weight
Ensuring that your trailer has the proper GVWR is very
important. Once that has been established and you
have the load on the trailer it is equally important that
you have proper weight distribution.
Landa TRV-3500 Service Manual 8.917-470.0 - R
TIRE AND LOADING INFORMATION
RENSEIGNEMENTS SUR LES PNEUS ET LE CHARGEMENT
The weight of cargo should never exceed
XXXX kg or XXXX lbs
TIRE SIZE COLD TIRE PRESS.
REAR XXXXXXX XXX KPA (XX PSI)
INTER XXXXXXXXX
FRONT XXXXX
SPARE XXXXX
SEE OWNER’S
MANUAL FOR
ADDITIONAL
INFORMATION
VOIR LE MANUAL
DE L’USAGER
POUR PLUS DE
RENSEIGNEMENTS
MANUFACTURED BY: KARCHER NORTH AMERICA INC. DATE OF MFG.:XX/XXXX
GAWR (EACH AXLE)
V.I.N. : TYPE : TRAILER TRX-XXXX
WITH TIRES RIMS AT COLD
XXXX KG (XXXX LB) XXXX XXXX XXX KPA (XX PSI) SINGLE
THIS VEHICLE CONFORMS TO ALL APPLICABLE U.S. FEDERAL MOTOR VEHICLE SAFETY STANDARDS
IN EFFECT ON THE DATE OF MANUFACTURE SHOWN ABOVE.
XXXXXXXXXXXXXXXXX
GVWR (XXXX KG (XXXX LB)

9
Important Trailer Safety Information
Tongue Weight
The tongue weight on your trailer is 10%-15% of the
total weight of the trailer and all the cargo that it is
carrying. This is the amount of weight that is then trans-
ferred to the tow vehicle through the ball hitch.
Example: The total weight of the trailer with load is
2500 pounds. The tongue weight should not be less
than 250 pounds (10%).
Too light of tongue weight can cause the trailer to “fish-
tail” (sway Weight Rating) as you travel down the
highway. This creates excessive strains on the tow
vehicle, hitch and on the trailer itself. It can very easily
lead to an accident.
To adjust for too light of a tongue weight the load must
be shifted for-ward with respect to the axle. This will
increase the weight that is transferred to the tongue.
Adjustments should be made until the tongue weight
falls within 10% -15% recommended range. Likewise, if
you have too much tongue weight adjust the weight
backwards with respect to the axle until the tongue
weight falls in the recommended range
Tow vehicles vary on how much tongue weight they can
support for proper towing.
Tire Pressure
Proper air pressure for your tires is printed on the
sidewall. Check pressure while tires are cold. Do not
raise or lower pressure to meet load. Pressure other
than recommended pressure will lead to excessive tire
wear or tire failure. Balancing recommended.
Wheels
Check wheels for hole elongation
or “out of round”. This condition
can be caused by lug nuts not
being tight or being too tight.
Trailer wheels can be damaged
by chuck holes or curb jumping.
You may not be aware of the road
shock to the wheels without
periodic checks. Replace any wheel that is bent.
Replace any wheel if you see elongation of the bolt
holes.
Wheel Lugs
Wheel lug nuts must be tightened with a torque wrench.
Refer to the chart below for proper torque.
1. Start all bolts or nuts by hand to prevent cross
threading.
2. Tighten bolts or nuts following sequence at right.
3. The tightening of the fasteners should be done in
stages. Following the recommended sequence,
tighten fasteners per wheel torque chart below.
4. Wheel nuts/bolts should be torqued before first
road use and after each wheel removal. Check and
re-torque after the first 10 miles, 25 miles and
again at 50 miles. Check periodically thereafter.
Landa TRV-3500 Service Manual 8.917-470.0 - R
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2
3
4
5

10
What to Check and How to Check
Wheel Torque Requirements
Ball Coupler Hitches
Coupler assembly includes a latch lever and latch lever
safety pin or hitch pin. Be sure the latch lever is locked
and the pin properly secured before moving your trailer.
The pin can be engaged fully only if ball is properly
seated in the coupler.
Tires
Before mounting tires onto wheels make certain that
the rim size and contour is approved for the tire as
shown in the Tire and Rim Association Yearbook or the
tire manufacturer’s catalog. Also make sure the tire will
carry the rated load. If the load is not equal on all tires
due to trailer weight distribution, use the tire rated for
the heaviest wheel position.
NOTE: The capacity rating molded into the sidewall
of the tire is not always the proper rating for the tire if
used in a trailer application. Use the following
guideline:
1. LT and ST tires: use the capacity rating molded into
the tire.
2. Passenger Car Tires: Use the capacity rating
molded into the tire sidewall divided by 1.10.
Use tire mounting procedures as outlined by the
Rubber Manufacturer’s Association or the tire
manufacturers.
NOTE: Tire wear should be checked frequently
because once a wear pattern becomes firmly
established in a tire it is difficult to stop, even if the
underlying cause is corrected.
WEAR PATTERN CAUSE ACTIONACTION
Center Wear Over
Inflation
Adjust pressure to
particular load per
tire catalog.
Edge Wear Under
Inflation
Adjust pressure to
particular load per
tire catalog.
Side Wear Loss of camber
or overloading
Make sure load
doesn't exceed axle
rating. Align at
alignment shop.
Toe Wear Incorrect
toe-in
Align at
alignment shop.
Cupping Out of
balance
Check bearing
adjustment and bal-
ance tires.
Flat Spots Wheel lockup &
tire skidding
Avoid sudden stops
when possible and
adjust brakes.
Landa TRV-3500 Service Manual 8.917-470.0 - R
TORQUE SEQUENCE
WHEEL
SIZE
1st
Stage
2nd
Stage
3rd
Stage
15" 20 - 25 50 - 60 90 - 120

11
Maintenance
Breakaway Switch & D.O.T. Wet Cell
Battery
After hitching to the tow vehicle, pull the safety pin on
the breakaway switch. Check to see if system is opera-
tional. Push safety pin back in to its original position.
Check battery fluid level every 60-90 days. Remove
cover. There are two fill caps. Refill with distilled water
only.
Breakaway Switch Mounted
on an A-Frame
Attach breakaway switch cable securely in a straight
line to the tow vehicle. Locate attachments so little
“slack” is left in the cable, but enough slack to allow for
turning without disengaging the pin. The cable will
activate brakes the instant a trailer becomes disen-
gaged. Brake adjustment is critical to stopping a disen-
gaged trailer.
Check Breakaway System & Brakes Before
Each Trip
1. Disconnect 12V plug from tow vehicle.
2. Pull breakaway pin.
3. While pin is pulled, move tow vehicle forward.
Brake should be on and wheels locked.
4. Replace pin and secure to tow vehicle. Do not loop
over hitch ball.
5. Plug 12V connector into tow vehicle receptacle.
6. Test brakes with brake controller.
NOTE: When disconnecting trailer from tow vehicle,
make sure to replace safety pin.
Brakes
Your trailer is equipped with electric brakes.
Complete service and repair information for the electric
brakes is found in the Axle Break Service Manual that
is furnished with your trailer.
NOTE: It is important to strictly adhere to the axle
break instructions for brake service and repair. In this
way, you are protecting the validity of all applicable
warranties.
Burnishing the Brakes
Brakes on a new trailer may tend to “grab” or pulsate. This
is normal. To correct the situation, pull the trailer with the
trailer brake control slightly engaged a short distance
(about 1000 ft or until trailer does not grab or pull to one
side anymore). This action smooths down the brake
bands.
NOTE: Do not lock up the wheels.
Reporting Safety Defects
If you believe that your trailer has a defect which could cause
a crash or could cause injury or death, you should immedi-
ately inform the National Highway Traffic Safety Administra-
tion (NHTSA) in addition to notifying Landa.
If NHTSA receives similar complaints, it may open an investi-
gation, and if it finds that a safety defect exists in a group of
trailers, it may order a recall and remedy campaign. However,
NHTSA cannot become involved in individual problems
between you, your dealer or Landa.
To contact NHTSA, you may either call the Auto Safety
Hotline toll-free at 1-888-327-4236 (TTY: 1-800-424-9153) or
write to:
NHTSA
1200 New Jersey Avenue, SE
Washington, DC 20590
You can also obtain other information about motor vehicle
safety from the http://www.safercar.gov
Landa TRV-3500 Service Manual 8.917-470.0 - R
Breakaway Battery on A-Frame
(Two fill caps
underneath cover)
P
ower Cable
Breakaway
Pin
Cable to Vehic
le

12
Maintenance
Preventative Maintenance
This trailer was produced with the best available materials and quality craftsmanship. However, you as the owner,
have certain responsibilities for the correct care of the equipment. Attention to regular preventative maintenance
procedures will assist in preserving the performance of your equipment.
Axles, Hubs and Brakes
Your Kärcher trailer is equipped with Dexter Component Axles. The Dexter Owner's Manual is included in the
materials received with your trailer. Maintenance for axles, hubs and brakes is extremely important for protecting
the longevity of your trailer. It is extremely important for your personal safety and the protection of others. Follow the
Dexter service recommendations exactly as described.
Please, never shortcut axle, hub and brake service and maintenance.
MAINTENANCE SCHEDULE
Tire Air Pressure Inflate to proper pressure indicated on sidewall Every Trip
Wheel Lugs, Bolts & Nuts Tighten to proper torque specifications Every 3000 mi or 3 mos.*
Wheel Check for damage and or out-of-round Every 6000 mi or 6 mos.
Coupler Ball
Check for sufficient lube.
Check lock mechanism.
Check for unusual wear.
Every trip
Safety Chains at Hitch Ball Check for abrasion, distortion
and general integrity of links. Every trip
Coupler Check for proper fastening &
hitch pin in position and secure. Every trip
Brakes Check for proper adjustment & operation Every trip
Breakaway Switch Test switch operation and connections Every trip
Breakaway Battery Pull switch pin, check charge indicator light Every trip
Load Distribution Check load distribution & security Every trip
Leveling Jacks Check fastenings. Lube. Every trip
Welds Check all weld beads for cracks or separations Every 6000 mi. or 6 mos.
Hinges Grease zerks with a Lithium complex grease Every 3000 mi. or 3 mos.
Tie Down Devices Check for fracturing, distortion
and improper anchoring. Every 3000 mi., or 3 mos.
Electrical:
Lights & Signals
Check to make sure all are working
properly. Replace burned out bulbs. Every trip
* Check lug nuts for tightness before initial trip, at 10 miles, 25 miles and 50 miles. Recheck at least every 3 months or 3000 miles
Landa TRV-3500 Service Manual 8.917-470.0 - R

13
Parts
Parts
(1.103-820.0)
LANDA TRV 3500
Landa TRV-3500 Service Manual 8.917-470.0 - R

14
TRV-3500 Trailer
Landa TRV-3500 Service Manual 8.917-470.0 - R
2C
2B
(Option)
17 73
75
74
Breakaway Kit 1
2A
3
4
5
11
12
13
24
15
6
7
8
9
10
16
66
23
19
20
25
26
27
28
32
33
60
30
31
34
35
38
39
40
45
41
42
46
47
49
50
36
37
5152
28
29
31
33
69
68
67
35
35 31
33
35
31
35
31
33
35
35
31
35
33
36
34
32
28
38
26
44
43
20
20
30
48
28
21
33
14
31
53
33
53
61
18
63
34
64
32
62
Rear
View
65
71
22
72
77
76, 69
72
31
35
33
35
70
33
79
78

15Landa TRV-3500 Service Manual 8.917-470.0 - R
TRV-3500 Trailer
REF PART NO. QTY DESCRIPTION NOTES
1 8.917-302.0 1 WLMT, FRAME, TRAILER, 3000#
2A 8.924-294.0 1 WLMT, TONGUE, HINGED
2B 8.924-492.0 1 WLMT, TONGUE, HINGED, HYDRAULIC COUPLER
2C 8.755-000.0 1 COUPLER, 2" BALL, 2X3" ADJUTS HGT
3 8.917-304.0 2 FENDER, W/BACK, 15", PAINTED
4 8.917-305.0 1 WLMT, HOOP, HOSE REEL
5 8.725-543.0 1 ROD, TIE-DOWN, TANK
6 8.917-325.0 2 BRACKET, SKID MOUNT, ADJ.
7 8.917-326.0 1 CHANNEL, SKID MOUNT, ADJ.
8 8.917-341.0 1 BAR, TANK TIE-DOWN
9 8.725-525.0 1 TANK, WATER, 200 GAL
- 8.704-744.0 1 LID, 8" THREADED W/AIR BREATHER NOT SHOWN
10 8.754-184.0 1 JACK, SWIVEL W/CASTER, 1200 LB
11 8.725-529.0 2 WHEEL/TIRE ASSY, 15" ST205/75D15 TI
12 8.725-530.0 2 LAMP, TAIL, 3-WAY
13 8.725-531.0 2 LAMP, SIDE MARKER, RED
14 8.725-532.0 2 LAMP, SIDE MARKER, AMBER
15 8.725-533.0 1 LAMP, LICENSE W/HOLDER
16 8.707-497.0 7.5 ft CHAIN, 5/16 ZINC PLATED 2 X 45" LONG
- 8.707-497.0 8.5 ft CHAIN, 5/16 ZINC PLATED 2 X 45" LONG HYDRAULIC BRAKES ONLY
17 8.725-536.0 1 CONNECTOR, SOCKET, 4-FLAT
18 8.725-537.0 1 PLUG, 4-FLAT
- 8.707-511.0 1 PLUG, 7-PRONG (ELECTRIC BRAKE)
19 8.725-540.0 1 AXLE, 3500 LB., 57" ELECTRIC BRAKES
- 8.725-539.0 1 AXLE, 3500 LB., 57" HYDRAULIC BRAKES
20 8.706-412.0 3 BUSHING, 1" X 3/4" MT X FT, PVC 80
21 9.802-132.0 1 ELBOW, 3/4" JIC X 1/2", 90°
22 8.707-498.0 2 HOOK, "S", 5/16" ZINC PLATED
23 8.707-526.0 1 STRAINER, 1" T LINE, TRAILERS
24 9.802-798.0 2 SCREW, #10 X 1/2" TEK
25 8.719-946.0 2 HANGER, HOSE
26 9.802-052.0 2 BULKHEAD, 3/4" POLYPRO
27 9.802-146.0 1 SWIVEL, 1/2" MP X 3/4" GHF W/STRAINER
28 9.802-152.0 4 SWIVEL, 3/4" SAE FEM, PUSH-ON
29 9.802-261.0 24" HOSE 3/4" PUSH-ON
30 9.802-701.0 3 BOLT, 1/4" X 1" HEX HEAD
- - 6 (ELECTRIC BRAKE)
31 9.802-722.0 36 BOLT, 3/8" X 1-1/4", NC HH
32 9.802-773.0 5 NUT, 1/4-20 ESNA NC
- - 8 (ELECTRIC BRAKE)
33 9.802-779.0 42 NUT 3/8"
34 9.802-802.0 12 WASHER, 1/4" FLAT SAE ZINC
- - 14 (ELECTRIC BRAKE)

16
TRV-3500 Trailer
REF PART NO. QTY DESCRIPTION NOTES
35 9.802-807.0 72 WASHER, 3/8” FLAT
36 9.802-812.0 14 WASHER, 3/8” X 1-1/2”, FENDER, SAE
37 8.706-738.0 2 PLUG, 3/4”, HOLE
38 8.706-899.0 2 NIPPLE, 3/4” JIC X 3/4” PIPE
39 9.802-724.0 2 BOLT, 3/8” X 1-1/2”, NC, HH, SS
40 8.900-522.0 2 LABEL, CLP WARNING, DO NOT STAND OR STEP
41 9.802-780.0 2 NUT, 3/8” STAINLESS, ESNA, NC
42 8.706-731.0 8 BUSHING, 3/4” SNAP HEYCO
43 8.706-369.0 1 NIPPLE, 3/4”, PVC 80, CLOSE
44 8.710-036.0 1 FLOAT VALVE 1" HUDSON
45 8.718-592.0 1 SCREW, 1/4” X 1-1/4” SHDR, 10-24
46 8.719-079.0 1 KNOB, BLACK PLASTIC, 10-24 THDS
47 8.719-112.0 1 SPRING, 0.31OD X 1.0, STEEL,
48 8.917-463.0 1 LATCH, WAND HOLDER
49 8.917-319.0 2 BRACKET, ALIGNMENT, TANK
50 8.706-395.0 1 PLUG, 2", PVC 80
51 8.706-294.0 1 BUSHING, 1/2” X 3/8”, STEEL
52 9.802-171.0 1 NIPPLE, 3/8” X 3/8” NPT ST MALE
53 9.803-557.0 2 ELBOW, 3/4 JIC X 3/4
54 8.725-541.0 1 HYDRAULIC LINE KIT (WITH HYDRAULIC BRAKES) NOT SHOWN
55 8.725-707.0 5 BOLT, 1/2” X 4-1/2” GRADE NOT SHOWN
- 2 (HYDRAULIC BRAKES)
56 8.718-829.0 2 NUT, 1/2” ESNA (HYDRAULIC BRAKES) NOT SHOWN
57 9.802-809.0 4 WASHER, 1/2” SAE (HYDRAULIC BRAKES) NOT SHOWN
58 8.912-403.0 1 BRACKET, BREAK AWAY (ELECTRIC BRAKE) NOT SHOWN
59 8.707-480.0 1 COUPLER, 2" HYDRAULIC ACTUATOR (HYDRAULIC
BRAKES) NOT SHOWN
60 9.802-261.0 51" HOSE, 3/4 PUSH-ON
61 8.706-890.0 1 ELBOW, 1/2” JIC X 3/4”
62 8.916-090.0 2 LABEL, LANDA LOGO, 11" X 3.5"
63 8.718-607.0 2 BOLT, CARRIAGE, 1/4-20 X 3/4
64 8.917-327.0 1 PLATE, LANDA, S.S.
65 8.706-397.0 1 PLUG, 3/4 (ALL EXCEPT PGHW)
-9.802-514.01
STRAIN RELIEF, LT, STR, 1/2 NPT,.23-.45D
(PGHW ONLY)
Landa TRV-3500 Service Manual 8.917-470.0 - R

17Landa TRV-3500 Service Manual 8.917-470.0 - R
TRV-3500 Trailer
REF PART NO. QTY DESCRIPTION NOTES
66 8.726-136.0 2 HOOK, LATCHING
67 8.749-879.0 1 ADHESIVE, 10" ROLL, 2.5" X 7"
68 - 1 VIN PLATE
69 9.807-349.0 2 LABEL, CLEAR LEXAN
70 8.917-340.0 2 BRACKET, SHIPPING
71 9.802-052.0 1 BULKHEAD, 3/4” POLYPRO (ALL EXCEPT PGHW)
- 8.750-743.0 1 BULKHEAD, 1/2” POLYPRO (PGHW ONLY)
72 8.752-014.0 4 GROMMET, LIGHT, 2"
73 8.755-310.0 2 5/8-11 X 4.5" GRADE 5 BOLT ECOGUARD COATED
74 8.755-309.0 2 5/8” GRADE 9 LOCKNUT ECOGUARD COATED
75 8.755-311.0 4 5/8” SAE FLAT WASHER ECOGUARD COATED
76 - 1 TIRE PLACARD
77 8.755-291.0 1 LABEL, NATM COMPLIANCE
78 8.932-968.0 1 LABEL, INTENDED FOR OUTDOOR USE - USA
79 9.800-034.0 1 LABEL CLEAR LEXAN 4.30" X 4.70"

18
Trailer With PGHW Washer
SenDEC
TACH/HOUR1/10
7
8
9
10
6
12
13
14
15
11
17
25
16
2
3
4
5
1
25
25
7
656
From
GHF
F
rom
T
ank
To
Valve To
Valve
To
Pump
20
11
From
Coil
Outlet
To Trailer
Outlet
22
23
21
To Unloader
Valve
ReplacesPGHW
Float Tank
24
Landa TRV-3500 Service Manual 8.917-470.0 - R

19Landa TRV-3500 Service Manual 8.917-470.0 - R
Trailer With PGHW Washer
REF PART NO. QTY DESCRIPTION NOTES
1 8.757-202.0 1 ELBOW, 3/4" 45° SAE X 1/2" M-NPTF, BRASS
2 9.802-961.0 1 HOSE CONNECTION BRACKET, PHW/PHWS/OHW
3 8.757-504.0 1 NIPPLE BRASS 3/4" X 1/2"
4 9.803-558.0 1 VALVE 3/4”
5 8.757-503.0 2 ELBOW BRASS 3/4" 45° SAE X 3/4" NPTF-M
6 9.802-152.0 3 SWIVEL, 3/4” SAE FEM, PUSH-ON
7 9.802-261.0 2.917 ft HOSE 3/4”
8 8.757-203.0 1 SWIVEL, 1/2" M-NPTF X 3/4" GHF
9 8.707-000.0 1 CONNECTOR, 1/2" ANCHOR
10 8.757-505.0 1 HOSE BARB BRASS 3/4" BARB X 1/2"
11 8.918-206.0 1 HOSE, 3/8” X 125", 2 WIRE, SWIVEL X SWIVEL
12 9.802-166.0 1 COUPLER, 3/8” FEMALE, BRASS
13 9.802-171.0 1 NIPPLE, 3/8” X 3/8” NPT ST MALE
14 8.757-340.0 1 ELBOW 3/8", STREET 90 DEG, STEEL, W/SLNT
15 9.802-722.0 4 BOLT, 3/8” X 1-1/4”, NC HH
16 9.802-807.0 8 WASHER, 3/8” FLAT
17 9.802-779.0 4 NUT, 3/8”
18 9.802-799.0 1 SCREW, #14 X 1", TEK, BLK., ZINC NOT SHOWN
19 9.802-204.0 1 CLAMP, HOSE, CL13 NOT SHOWN
20 8.706-294.0 1 BUSHING, 1/2” X 3/8” STEEL
21 9.802-511.0 1 TIE RAP
22 8.706-959.0 1 HOSE BARB, 1/4” DOUBLE
23 9.802-252.0 10 ft HOSE, 1/4" X 1/2", BRAIDED VINYL, /FT
24 9.804-016.0 1 FILTER SCREEN WASHER, GARDEN HOSE/
30MESH
25 8.757-911.0 4 AMBER REFLECTIVE LABEL B489A ALL TRAILERS

20
Trailer With PGDC Washer
7
821
9
10
6
14
15
11
17
16
2
3
4
5
1
From
GHF
F
rom
T
ank
To
Valve
To
Valve
765
6
To
Pump
11
20
From
Coil
Outlet
To Trailer
Outlet
12
13
Landa TRV-3500 Service Manual 8.917-470.0 - R