Fisher HT Series User manual

A DIVISION OF FISHER, LLC
CAUTION
Read this document before installing the
snowplow.
CAUTION
See your FISHER®outlet/website for specific
vehicle application recommendations before
installation. The eMatch selection system has
specific vehicle and snowplow requirements.
HT Series™ SNOWPLOW
Installation Instructions
Fisher Engineering
December 15, 2016
Lit. No. 69829, Rev. 01
69400, 69450
69450-1, 69450-2
50 Gordon Drive, Rockland, Maine 04841-2139 • www.fisherplows.com

Lit. No. 69829, Rev. 01 2 December 15, 2016
69400, 69450, 69450-1, 69450-2
SAFETY DEFINITIONS
NOTE: Indicates a situation or action that can lead
to damage to your snowplow and vehicle or other
property. Other useful information can also be
described.
Instruction Label Warning/Caution Label
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor or
moderate injury. It may also be used to alert
against unsafe practices.
WARNING/CAUTION AND INSTRUCTION
LABELS
Become familiar with and inform users about the
warning labels on the back of the blade and the
instruction label on the headgear.
NOTE: If labels are missing or cannot be read, see
your sales outlet.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious personal injury.

Lit. No. 69829, Rev. 01 3 December 15, 2016
69400, 69450, 69450-1, 69450-2
HYDRAULIC SAFETY
• Always inspect hydraulic components and hoses
before using. Replace any damaged or worn parts
immediately.
• If you suspect a hose leak, DO NOT use your
hand to locate it. Use a piece of cardboard or
wood.
FUSES
The FISHER®electrical and hydraulic systems contain
several blade-style automotive fuses. If a problem
should occur and fuse replacement is necessary,
the replacement fuse must be of the same type and
amperage rating as the original. Installing a fuse with
a higher rating can damage the system and could start
a fire. Fuse Replacement, including fuse ratings and
locations, is located in the Maintenance Section of the
Owner's Manual.
PERSONAL SAFETY
• Remove the ignition key and put the vehicle in
park or in gear to prevent others from starting the
vehicle during installation or service.
• Wear only snug-fitting clothing while working on
your vehicle or snowplow.
• Do not wear jewelry or a necktie, and secure long
hair.
• Wear safety goggles to protect your eyes from
battery acid, gasoline, dirt and dust.
• Avoid touching hot surfaces such as the engine,
radiator, hoses and exhaust pipes.
• Always have a fire extinguisher rated BC handy,
for flammable liquids and electrical fires.
WARNING
Hydraulic fluid under pressure can cause skin
injection injury. If you are injured by hydraulic
fluid, get medical attention immediately.
SAFETY PRECAUTIONS
Improper installation and operation could cause
personal injury, and/or equipment and property damage.
Read and understand labels and the Owner's Manual
before installing, operating or making adjustments.
WARNING
Lower the blade when the vehicle is parked.
Temperature changes could change
hydraulic pressure, causing the blade to
drop unexpectedly or damaging hydraulic
components. Failure to do this could result in
serious personal injury.
WARNING
Remove blade assembly before placing
vehicle on hoist.
WARNING
The driver shall keep bystanders clear of
the blade when it is being raised, lowered or
angled. Do not stand between vehicle and blade
or within 8 feet of a moving blade. A moving or
falling blade could cause personal injury.
WARNING
Do not exceed GVWR or GAWR including
blade and ballast. The rating label is found on
driver-side vehicle door cornerpost.
WARNING
To prevent accidental movement of the blade,
always turn the control OFF whenever the
snowplow is not in use. The power indicator
light will turn OFF.
WARNING
Keep hands and feet clear of the blade and
A-frame when mounting or removing the
snowplow. Moving or falling assemblies could
cause personal injury.
CAUTION
Refer to the current eMatch selection system
for minimum vehicle recommendations and
ballast requirements.

Lit. No. 69829, Rev. 01 4 December 15, 2016
69400, 69450, 69450-1, 69450-2
FIRE AND EXPLOSION
Be careful when using gasoline. Do not use gasoline
to clean parts. Store only in approved containers away
from sources of heat or flame.
CELL PHONES
A driver's first responsibility is the safe operation of
the vehicle. The most important thing you can do
to prevent a crash is to avoid distractions and pay
attention to the road. Wait until it is safe to operate
Mobile Communication equipment such as cell phones,
text messaging devices, pagers or two-way radios.
VENTILATION
BATTERY SAFETY
NOISE
Airborne noise emission during use is below 70 dB(A)
for the snowplow operator.
VIBRATION
Operating snowplow vibration does not exceed
2.5 m/s2to the hand-arm or 0.5 m/s2to the whole
body.
TORQUE CHART
Recommended Fastener Torque
Chart (ft-lb)
Size SAE
Grade 2
SAE
Grade 5
SAE
Grade 8
1/4-20
5/16-18
3/8-16
3/8-24
7/16-14
1/2-13
9/16-12
5/8-11
3/4-10
7/8-9
1-8
6
11
19
24
30
45
66
93
150
150
220
9
18
31
46
50
75
110
150
250
378
583
13
28
46
68
75
115
165
225
370
591
893
Metric Grade 8.8 (ft-lb)
Size TorqueSize
Torque
M 6
M 8
M 10
M 12
M 14
M 16
7
17
35
60
95
155
These torque values apply to fasteners
except those noted in the instruction.
CAUTION
Read instructions before assembling.
Fasteners should be finger tight until
instructed to tighten according to torque
chart. Use standard methods and practices
when attaching snowplow including proper
personal protective safety equipment.
WARNING
Vehicle exhaust contains lethal fumes.
Breathing these fumes, even in low
concentrations, can cause death. Never
operate a vehicle in an enclosed area without
venting exhaust to the outside.
WARNING
Gasoline is highly flammable and gasoline
vapor is explosive. Never smoke while
working on vehicle. Keep all open flames
away from gasoline tank and lines. Wipe up
any spilled gasoline immediately.
CAUTION
Batteries normally produce explosive gases,
which can cause personal injury. Therefore,
do not allow flames, sparks or lit tobacco
to come near the battery. When charging or
working near a battery, always cover your
face and protect your eyes, and also provide
ventilation.
• Batteries contain sulfuric acid, which burns
skin, eyes and clothing.
• Disconnect the battery before removing or
replacing any electrical components.

Lit. No. 69829, Rev. 01 5 December 15, 2016
69400, 69450, 69450-1, 69450-2
BLADE, A-FRAME AND HEADGEAR
1. Remove the headlamp box and small parts box
from the carton. Remove the carton wall sleeve by
sliding it up and over the box contents. Remove
and discard the four corner tubes and place
the sleeve flat on the floor. Remove the two lag
screws (located on either side of the lift ram)
securing the A-frame to the pallet.
NOTE: When the lift ram is pinned, the headgear
can still rotate forward when loaded. A relief valve
is built into the lift portion of the hydraulic circuit.
Insert the 5/8" x 3-1/2" clevis pin through the top
hole on the lift frame to secure the base end of
the lift ram to the lift frame. Remove the headgear,
A-frame and power unit assembly from the box
and place it on the carton sleeve.
2. Place some cardboard or wood on the floor
where the blade will be assembled. Remove the
blade from the pallet and place it face down.
Place the A-frame nose plate over the quadrant
pivot section. Insert the 1" x 9" pivot bolt (from
top to bottom) through all holes. Secure with a
1" locknut. Tighten locknut as much as possible
while allowing A-frame and quadrant to pivot.
3. Cut the tie holding the angle rams to the A-frame.
Swing the A-frame to one side so that the holes in
the rod end of the angle ram and the brackets on
the back of the quadrant are aligned.
4. Install a 1" x 3-1/4" clevis pin from the top down.
Swing the A-frame to the other side and secure
the second angle ram in the same manner. Secure
the angle rams by installing 1/4" x 1-1/2" cotter
pins in the two rod-end clevis pins.
5. Stand the blade, headgear and A-frame assembly
upright while resting the A-frame on the ground.
Install the blade guides.
1" x 9" Pivot Bolt
1" Locknut
1" x 3-1/4" Clevis Pin
Cotter
Pin

Lit. No. 69829, Rev. 01 6 December 15, 2016
69400, 69450, 69450-1, 69450-2
Upper Hole
Lower
Hole
Clevis
Pin
Cotter Pin
Upper Hole
Lower
Hole
Hairpin
Cotter
Clevis
Pin
6. With the vehicle parked on a solid, level surface,
measure the distance from the center of the
connecting pin hole to the ground. Using this
measurement, refer to the hole selection chart
below and determine which hole should be used
to attach the headgear to the A-frame.
Pushplate Height
(hole center to ground)
Headgear
Rear Hole
Less than or equal to 16" Upper
Greater than 16" Lower
Measure
This Distance
Center of
Connecting
Pin Hole
7. If the pushplate height is 16" or less, ensure
that the A-frame is pinned to the upper headgear
hole. The base end of the lift ram must also be in
the upper position.
If the pushplate height is greater than 16",
move the A-frame and lift ram to the lower
headgear holes.
8. Raise the back end of the assembly and support
it in a level position using a block under the main
A-frame tubes. Lower the jacks according to the
instructions on the back of the blade (Detach
Step 2). Remove the support block from under
the A-frame tubes.

Lit. No. 69829, Rev. 01 7 December 15, 2016
69400, 69450, 69450-1, 69450-2
HEADLAMPS
Headlamps, hardware and instructions are found in
the headlamp box.
1. Attach the headlamps to the hole and slot in the
headgear light bracket by following the instructions
included with the headlamps.
2. Secure the snowplow harnesses and cables to the
headgear as shown.
3. Insert seven cable tie anchors into the 1/4" holes
on the rear of light bar from the inside, with the
locking tabs horizontal.
4. Install a split rubber grommet on each headlamp
wire 3" from the headlamp and insert the grommet
and wire into the slot on the rear of the light bar.
5. Route the wires underneath the light bar, behind
the vertical supports, and down along the inside of
the driver-side vertical support, securing the wires
to the anchors with cable ties.
Cable Boot
Snowplow
Lighting
Harness
Snowplow
Battery
Cable
Cable Ties
WARNING
Your vehicle must be equipped with snowplow
headlamps and directional lights.

Lit. No. 69829, Rev. 01 8 December 15, 2016
69400, 69450, 69450-1, 69450-2
FILLING THE HYDRAULIC UNIT
1. Attach the snowplow to the vehicle according to
the instructions on the back of the blade.
The HT Series™ snowplow hydraulic system
comes pre-assembled, filled and fully tested from
the factory.
2. When checking the fluid level of a hydraulic unit
at installation, remove the factory-installed pipe
plug. With the blade in the lowered position, the
fluid level should be within 2-1/2" from the top of
the fill hole. If additional fluid is needed, fill the
reservoir with FISHER®EZ Flow Hydraulic Fluid
rated to –40°F (–40°C), or other fluid conforming
to Military Specification MIL-H-5606 A, such as
Mobil Aero HFA or Shell AeroShell®Fluid 4.
3. Replace the pipe plug removed in Step 2 with the
breather/fill plug (included in the parts box).
WARNING
Keep 8' (2.5 m) clear of the blade when it is
being raised, lowered or angled. Do not stand
between vehicle and blade or directly in front
of the blade. If the blade hits or drops on you,
you could be seriously injured.
WARNING
To prevent accidental movement of the blade,
always turn the control OFF whenever the
snowplow is not in use. The power indicator
light will turn OFF.
CAUTION
Do not mix different types of hydraulic fluid.
Some fluids are not compatible and may
cause performance problems and product
damage. FLUID CAPACITY
• Insta-Act®Unit Reservoir 1-3/4 quarts
• Insta-Act System Total 2-3/8 to 2-3/4 quarts
Drain
Plug
Breather/Fill Plug
AeroShell®is a registered trademark (®) of Shell Oil Company.

Lit. No. 69829, Rev. 01 9 December 15, 2016
69400, 69450, 69450-1, 69450-2
BLADE DROP SPEED ADJUSTMENT
The quill in the valve manifold adjusts the blade drop
speed.
1. Lower the blade to the ground before making an
adjustment.
2. Turn the quill IN (clockwise) to decrease drop
speed. Turn the quill OUT (counterclockwise) to
increase drop speed.
3. Stand 8 feet clear of the blade when checking the
adjustment.
WARNING
Keep 8' (2.5 m) clear of the blade when it is
being raised, lowered or angled. Do not stand
between vehicle and blade or directly in front
of the blade. If the blade hits or drops on you,
you could be seriously injured.
Quill

Lit. No. 69829, Rev. 01 10 December 15, 2016
69400, 69450, 69450-1, 69450-2
8. Turn the vehicle ignition to the "ON" or
"Accessory" position. Turn the control ON.
9. While pressing the RAISE button on the snowplow
control, note the hydraulic gauge pressure reading
as the blade is rising. (The pressure can only be
read as the blade is rising. It may be necessary to
perform this process more than once to obtain an
accurate reading.) The recommended pressure is
350 psi.
10. If the hydraulic pressure reading is less than
350 psi, increase the pressure by turning the
scrape lock valve stem clockwise 1/4 turn and
retest the pressure.
NOTE: Adjustments should be made in 1/4-turn
increments.
11. Repeat Steps 9 and 10 until the recommended
pressure (350 psi) is obtained.
NOTE: Adjusting the scrape lock pressure
in excess of the recommended pressure will
increase amp draw and will shorten the life of
the plow motor.
12. Once the recommended pressure is obtained,
lower the blade completely and turn the control
OFF. Turn the vehicle ignition to the "OFF"
position.
13. Disconnect the snowplow battery cable from the
vehicle battery cable.
SCRAPE LOCK ADJUSTMENT
1. Park the vehicle on a smooth, level, hard surface,
such as concrete. Lower the blade to the ground
and turn the control OFF. Leave the snowplow
attached to the vehicle. Turn the vehicle ignition to
the "OFF" position.
2. Disconnect the snowplow battery cable from the
vehicle battery cable.
3. Remove the hydraulic unit cover.
4. Loosen the breather/fill plug slowly to relieve any
pressure in the reservoir.
5. Using a "Tee" fitting, install a 500–600 psi gauge
in the lift ram base hose.
6. Retighten the breather/fill plug.
7. Reconnect the snowplow battery cable to the
vehicle battery cable.
Hose
Pressure
Gauge
To Lif t Ram Base
Scrape Lock
Adjustment
= Increase Pressure
= Decrease Pressure
CAUTION
Never operate the unit while adjusting the
scrape lock valve. Doing so will damage the
scrape lock valve O-rings.

Lit. No. 69829, Rev. 01 11 December 15, 2016
69400, 69450, 69450-1, 69450-2
14. Loosen the breather/fill plug slowly to relieve any
pressure in the reservoir.
15. Remove the hydraulic testing "Tee" fitting and
gauge from the lift ram base hose.
16. Reconnect the lift ram base hose and tighten it
securely.
17. Check the hydraulic fluid level and add fluid if
necessary.
18. Retighten the breather/fill plug.
19. Replace the hydraulic unit cover.
CAUTION
Do not mix different kinds of hydraulic fluid.
Some fluids are not compatible and may
cause performance problems and product
damage.
FINAL ADJUSTMENTS
1. With the snowplow attached to the properly
ballasted vehicle and the blade lowered to the
ground, the A-frame should be parallel with the
ground.
2. Fully angle the blade in raised and lowered
positions. Adjust hose fittings and wraps so the
hoses do not contact the vehicle bumper, have no
sharp bends, and are wrapped at contact points
with the headgear and blade.

Lit. No. 69829, Rev. 01 12 December 15, 2016
69400, 69450, 69450-1, 69450-2
VEHICLE LIGHTING CHECK
1. Verify the operation of all vehicle front lighting
prior to connecting the snowplow harness.
2. Check the operation of the snowplow lights with
snowplow mounted to vehicle and all harnesses
connected.
Turn Signals and Parking Lamps
Parking lamps ON:
• Both vehicle and snowplow parking lamps
should be ON at the same time.
Driver-side turn signal ON:
• Both vehicle and snowplow driver-side turn
signal lamps should flash at the same time.
Passenger-side turn signal ON:
• Both vehicle and snowplow passenger-side
turn signal lamps should flash at the same time.
Headlamps
Move the vehicle headlamp switch to the
"ON" position. Connecting and disconnecting the
snowplow lighting harness plug should switch the
lights between vehicle and snowplow as follows:
Snowplow lighting harness DISCONNECTED:
• Vehicle headlamps should be ON.
• Snowplow headlamps should be OFF.
Snowplow lighting harness CONNECTED:
• Snowplow headlamps should be ON.
• Vehicle headlamps should be OFF.
The dimmer switch should toggle the headlamps
between high and low beams. The high-beam
indicator on the dash should light when the
headlamps are placed in high beam.
Daytime Running Lamps (DRLs)
An operational check of the vehicle and snowplow
DRLs will depend on the vehicle model, vehicle
DRL system and type of Isolation Module
installed. Due to the variations in the OEM DRL
systems and the different Isolation Module
options available, checking the functionality of the
snowplow DRLs will depend on the type of module
installed on the vehicle.
With the headlamp switch OFF, activate the
vehicle DRLs.
Snowplow lighting harness DISCONNECTED:
• Vehicle DRLs should be ON.
• Snowplow headlamps should be OFF.
Snowplow lighting harness CONNECTED and
vehicle in DRL mode:
• Check the snowplow DRL function per type of
Isolation Module installed.
Refer to the Mechanic's Guide for information on
the Isolation Module DRL functions.
Hand-Held Control
The snowplow plugs do need to be connected to
the vehicle harness connectors. The control power
indicator light should light whenever the control
ON/OFF switch and the ignition (key) switches are
both in the "ON" position.
3. Connect all snowplow and vehicle harnesses.
Raise the snowplow and aim the snowplow
headlamps according to the Snowplow Headlamp
Beam Aiming instructions included with the
headlamps, and any state or local regulations.
4. Check the aim of the vehicle headlamps with the
snowplow removed.
5. When the snowplow is removed from the vehicle,
install plug covers on the vehicle battery cable
and lighting harness. Insert the snowplow battery
cable and lighting harness into the cable boot on
the snowplow.
CAUTION
On 2-plug electrical systems, plug covers shall
be used whenever snowplow is disconnected.
Vehicle Battery Cable is 12-Volt unfused
source.

Lit. No. 69829, Rev. 01 13 December 15, 2016
69400, 69450, 69450-1, 69450-2
OWNER'S MANUAL PACKET
If the completed snowplow will be delivered
immediately, the Owner's Manual should be reviewed
with and given to the purchaser.
If the snowplow is completed prior to delivery to the
purchaser, attach the Owner's Manual Packet to the
electrical cable of the cab control for safekeeping.

Lit. No. 69829, Rev. 01 14 December 15, 2016
69400, 69450, 69450-1, 69450-2
Fisher Engineering reserves the right under its product improvement policy to change construction or design details and furnish equipment
when so altered without reference to illustrations or specifications used. Fisher Engineering or the vehicle manufacturer may require or
recommend optional equipment for snow removal. Do not exceed vehicle ratings with a snowplow. Fisher Engineering offers a limited
warranty for all snowplows and accessories. See separately printed page for this important information. The following are registered (®) or
unregistered (™) trademarks of Douglas Dynamics, LLC: FISHER®, HT Series™, Insta-Act®, Minute Mount®2.
Printed in U.S.A.