Mi-T-M WCU Series User manual

OPERATORS MANUAL FOR Mi-T-M®
WCU SERIES
Undercarriage Wash System
CAUTION
RISK OF INJURY!
READ MANUAL BEFORE OPERATING!
This manual is an important part of the Undercarriage Wash System and must re-
main with the unit when you sell it!
©Copyright 2021, Mi-T-M Corporation® 37-1498-022521

2 Mi-T-M®Undercarriage Wash System Operator's Manual
TABLE OF CONTENTS
INTRODUCTION .............................................................................................................3
CONTENTS OF THE UNDERCARRIAGE WASH SYSTEM ...........................................4
SPECIFICATIONS............................................................................................................4
IMPORTANT SAFETY WARNINGS.................................................................................5
UNDERCARRIAGE WASH SYSTEM FEATURES ..........................................................8
INSTALLATION................................................................................................................9
PLUMBING CONNECTIONS: ..................................................................................................................10
ELECTRICAL CONNECTIONS:................................................................................................................11
PRE-OPERATION CHECKLIST................................................................................................................13
OPERATION ..................................................................................................................14
FILLING AND PRIMING SYSTEM............................................................................................................14
OPERATION GUIDELINES.......................................................................................................................14
START-UP: ...............................................................................................................................................15
OPERATION:............................................................................................................................................15
WINTERIZING .........................................................................................................................................15
TROUBLESHOOTING ...................................................................................................16
STATEMENT OF WARRANTY ......................................................................................18
WARNING: This product can expose you to
chemicals including carbon monoxide, which is
known to the State of California to cause birth
defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING
WARNING: This product can expose you to
chemicals including Lead, which is known to
the State of California to cause cancer and birth
defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING

Mi-T-MUndercarriage Wash System Operator's Manual 3
Congratulations on the purchase of your new Mi-T-M Undercarriage Wash System. The system is designed to wash
and rinse the undersides of vehicles or equipment before or after primary cleaning to remove dirt, grime and road
salts from these hard to reach areas.
Mi-T-M Undercarriage Wash System can be used in a variety of environments, including:
Rental Yards
Heavy Equipment Dealers
Trucking Facilities
Military Bases
Truck Rental Fleets
Forklift Washing Operations
Aircraft Maintenance & Restoration
Shipyards
Mining Operations
The information in this operator's manual was compiled for your benet. By reading and following the simple safety,
installation, operation, maintenance and troubleshooting steps described in this manual, you will receive years of
trouble free operation from your new Mi-T-M Undercarriage Wash System. The contents of this manual are based
on the latest product information available at the time of publication. Mi-T-M reserves the right to make changes in
price, color, materials, equipment, specications or models at any time without notice.
! IMPORTANT !
THESE PARAGRAPHS ARE SURROUNDED BY A "SAFETY ALERT BOX". THIS BOX IS USED TO
DESIGNATE AND EMPHASIZE SAFETY WARNINGS THAT MUST BE FOLLOWED WHEN OPERATING
THIS UNDERCARRIAGE WASH SYSTEM. ACCOMPANYING THE SAFETY WARNINGS ARE "SIGNAL
WORDS" WHICH DESIGNATE THE DEGREE OR LEVEL OF HAZARD SERIOUSNESS. THE "SIGNAL
WORDS" USED IN THIS MANUAL ARE AS FOLLOWS:
DANGER: INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL
RESULT IN DEATH OR SERIOUS INJURY.
WARNING: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN DEATH OR SERIOUS INJURY.
CAUTION: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED MAY
RESULT IN MINOR OR MODERATE INJURY.
THE SYMBOL SET BELOW THIS PARAGRAPH IS A "SAFETY ALERT SYMBOL". THIS SYMBOL IS USED
TO CALL ATTENTION TO ITEMS OR PROCEDURES THAT COULD BE DANGEROUS TO YOU OR
OTHER PERSONS USING THIS EQUIPMENT.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ ALL
INSTRUCTIONS BEFORE OPERATING THIS UNDERCARRIAGE WASH SYSTEM AND ESPECIALLY
POINT OUT THE "SAFETY WARNINGS" TO PREVENT THE POSSIBILITY OF PERSONAL INJURY TO
THE OPERATOR.
ONCE THE UNIT HAS BEEN UNCRATED, IMMEDIATELY WRITE IN THE SERIAL NUMBER OF YOUR UNIT IN
THE SPACE PROVIDED BELOW.
SERIAL NUMBER_________________________________
Inspect for signs of obvious or concealed freight damage. If damage does exist, le a claim with the transportation
company immediately. Be sure that all damaged parts are replaced and that the mechanical and electrical problems
are corrected prior to operation of the unit. If you require service, contact Mi-T-M Customer Service.
CALL OUR TOLL-FREE NUMBER
800-553-9053
for the Sales or Service Center nearest you! Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase
INTRODUCTION

4 Mi-T-M®Undercarriage Wash System Operator's Manual
SPECIFICATIONS
CONTENTS OF THE UNDERCARRIAGE WASH SYSTEM
Carefully unpack your new Mi-T-M Undercarriage Wash System. Contact the freight line if a damage claim is re-
quired on any component. The following items are the basic equipment sent with your Undercarriage Wash System.
1. Pump Skid
2. Remote Control Box and Photo-eye
3. Holding Tank
4. 2” Supply Jumper Hose- 5’ Long
5. Spray Bar
6. Spray Bar Cover
7. Manual and Parts List
MODEL# WCU-35-0ME1 WCU-35-0ME3
FLOW (GPM) 35
PSI 110
HORSEPOWER 3
VOLTAGE 230 208-230
AMPERAGE 15 10
HZ 60
PHASE 1 3
OPTIONS N/A WX-0144 (460V 3PHASE- 5 AMPS)
PUMP SKID DIMENSIONS 42"L X 20"W X 40"H
HOLDING TANK VOLUME 250 GALLONS
HOLDING TANK SIZE 36"DIAMETER X 62"TALL
SPRAY BAR 94"L, 1-1/2" STAINLESS SQ. TUBING, 1"FPT CONNECTION
SPRAY BAR COVER 100"L X 6"W X 1/2"H STEEL PLATE
SPRAY BAR NOZZLES (16X) 25 DEGREE SIZE 15
SHIPPING WEIGHT 450LBS

Mi-T-MUndercarriage Wash System Operator's Manual 5
IMPORTANT SAFETY WARNINGS
WARNING: When using this product, basic precautions should always be observed, including the following:
READ ALL SAFETY WARNINGS BEFORE USING YOUR Mi-T-M UNDERCARRIAGE WASH SYSTEM
POTENTIAL CONSEQUENCE PREVENTION
Serious injury or death could
occur if the Undercarriage Wash
System is not properly grounded.
Your Undercarriage Wash System
is powered by electricity and may
cause electric shock or electrocu-
tion if not installed properly.
Electrical shock may occur if the
Undercarriage Wash System is
not operated properly.
Serious injury or death may occur
if electrical repairs are attempted
by unqualied persons.
Installation of this unit, including all electri-
cal connections, must comply with all local,
state and national codes.
This product must be grounded. Connect
to a GFCI circuit breaker when available. If
the unit should malfunction or breakdown,
grounding provides a path of least resis-
tance for electric current to reduce the risk
of electric shock. Do not ground to a gas
supply line.
Improper connection of the equip-
ment-grounding conductor can result in a
risk of electrocution. Check with a qualied
electrician or service personnel if you are in
doubt as to whether the system is properly
grounded.
Always be certain the unit is receiving prop-
er voltage (+/- 5% of the voltage listed on
the nameplate). Before installing electrical
connections, be certain the power switches
are in the "OFF" position.
Keep all connections dry.
DO NOT spray on or into electrical instal-
lations of any kind! This includes electrical
outlets, light bulbs, fuse boxes, transform-
ers, the Undercarriage Wash System itself,
etc..
DO NOT allow metal components of the
Undercarriage Wash System to come in
contact with live electrical components.
Never operate the Undercarriage Wash
System with safety guards/covers removed
or damaged. Ensure all electrical covers are
securely in place when unit is operating.
Any electrical wiring or repairs performed
on this Undercarriage Wash System should
be done by Authorized Service Personnel in
accordance with National and Local electri-
cal codes.
Before opening any electrical enclosure, al-
ways shut off the Undercarriage Wash Sys-
tem. Disconnect the Undercarriage Wash
System from the power source. If the power
disconnect is not in sight, lock it in the open
position and tag it to prevent power usage.
(Never assume the Undercarriage Wash
System is safe to work on just because it is
not operating! Always disconnect from the
power source.)
RISK OF ELECTRIC SHOCK
OR ELECTROCUTION
HAZARD

6 Mi-T-M®Undercarriage Wash System Operator's Manual
Never allow any part of your body to con-
tact the electrical motor until cooled.
POTENTIAL CONSEQUENCE PREVENTION
IMPORTANT SAFETY WARNINGS
RISK OF EXPLOSION OR FIRE Serious injury or death could
occur from an explosion or re
caused by a system electric
spark.
This unit must be placed in an area that is
well ventilated, free of ammable vapors,
combustible dust, gases or other combusti-
ble materials.
HAZARD
RISK OF BURNS
Serious injury may occur to the
operator from moving parts on the
Undercarriage Wash System.
Do not operate the unit without all protec-
tive covers in place.
Follow the maintenance instructions speci-
ed in the manual.
RISK FROM MOVING PARTS
Serious injury may occur from
touching the electrical motor.
This area can remain hot for
some time after the Undercar-
riage Wash System is shut-
down.
RISK OF BURSTING Serious injury or death could
occur from bursting caused by ex-
cessive pressure in the system.
Serious injury may occur if
attempting to start the Under-
carriage Wash System when the
pump is frozen.
Do not use this Undercarriage Wash System
to pump ammable material! An explosion
could occur.
In freezing temperatures, the unit must be
protected from freezing. Do not start the
Undercarriage Wash System if it has been in
a freezing environment without rst allowing
the pump to thaw.

Mi-T-MUndercarriage Wash System Operator's Manual 7
POTENTIAL CONSEQUENCE PREVENTION
IMPORTANT SAFETY WARNINGS
Serious injury or death could oc-
cur from water spray penetrating
the skin.
Keep clear of nozzle and spray! Never put
your hand, ngers or body directly over the
spray nozzle.
Never point the discharge spray at yourself
or anyone else.
Always keep operating area clear of all
persons.
SEEK EMERGENCY MEDICAL CARE if the
spray appears to have penetrated the skin!
DO NOT TREAT AS A SIMPLE CUT!!
Hoses should be inspected daily for signs of
wear. If evidence of failure exists, prompt-
ly replace all suspect hoses to prevent the
possibility of injury from the spray. If a hose
or tting is leaking, NEVER PLACE YOUR
HAND DIRECTLY ON THE LEAK.
Before removing the spray nozzle or servic-
ing the unit, ALWAYS shut off the unit and
release trapped pressure. (Even after you
shut off the unit, there is pressurized water
left in the pump and hose until you release it).
RISK OF BODILY INJURY Do not start or operate the unit until an op-
erator is securely bracing the spray nozzle.
ALWAYS wear protective goggles when
operating the Undercarriage Wash System
to shield the eyes from ying debris.
DO NOT direct spray toward fragile materi-
als such as glass. Shattering could occur.
Stay alert-watch what you are doing. Do
not operate the unit when fatigued or under
the inuence of alcohol or drugs.
NEVER open the water nozzle unless se-
curely braced.
DO NOT overreach or stand on unstable
support.
Wet surfaces can be slippery, wear protec-
tive foot gear and keep good footing and
balance at all times.
NEVER open the water nozzle while on a
ladder or roof.
Do not direct spray at people or pets. The
force of the water can knock a person
down.
DO NOT DRINK THE WATER IN THE
Undercarriage Wash System!! This is
non-potable water and is not suitable for
consumption.
DO NOT allow children to operate this unit.
Know how to stop the Undercarriage Wash
System quickly. Be thoroughly familiar with
controls.
DO NOT leave the Undercarriage Wash
System unattended. Shut off the Undercar-
riage Wash System before leaving.
Serious injury or death may occur
from the contact force of an un-
controlled water nozzle.
Serious injury can occur from
loose debris being propelled at a
high speed from the water nozzle.
Injury may occur if the operator
loses his balance caused by the
thrust of water traveling through
the water nozzle.
Injury may occur from the Under-
carriage Wash System.
RISK OF INJECTION OR
SEVERE CUTTING INJURY
!SAVE THESE INSTRUCTIONS!
HAZARD

8 Mi-T-M®Undercarriage Wash System Operator's Manual
UNDERCARRIAGE WASH SYSTEM FEATURES
WCU FEATURES 020121
1 Water Supply Connection
2 Tank Drain Plug
3 Pump Supply Hose
4 Power On Switch
5 Control Panel
6 Pressure Gauge
7 Solenoid Valve
8 Spray Bar Cover
9 Spray Bar
10 Nozzles
11 Selector Switch Remote
12 Photo-Eye
13 Multistage Pump
14 Priming Plug
15 Tank Shut-Off Valve
16 Product Tank
16
1412
11 13
67
15
1
2
3
5
4
10
9
8

Mi-T-MUndercarriage Wash System Operator's Manual 9
INSTALLATION
INSTALLATION:
1. Place pump skid and holding tank on level concrete surface in an enclosed
area preferably with oor drain. Place holding tank within a few feet of pump
close enough to allow 5’ supply hose to reach. Level pump as needed with
feet levelers and anchor to concrete if desired. Do not allow pump or tank to
be exposed to freezing temperatures.
2. Place spray bar inside concrete trench, nozzles about 1” below the concrete
surface. Level and Anchor into place- allow enough room for connection hose
or piping to connect to spray bar. Do not allow spray bar to be exposed to
freezing temperatures.
NOTE: Trench will accumulate water and dirt so a drain line needs to be
installed to wash bay main trench or drain line.
Figure 1: Spray Bar dimensions and nozzle spacing
Figure 2: Cover dimensions
Figure 3: Trench minimum dimensions for spray bar and cover installation.
3. Place Cover over spray bar on lip of concrete trench. Center slots over nozzles.
4. Install selector switch remote box and photo-eye to wash-bay wall in front of
undercarriage trench. Photo-eye will reach a maximum of 10’, so it needs to
be placed within this distance of the equipment or vehicles moving by. Place
far enough in front spray bar to avoid water spraying photo-eye or remote
box at least 10 ft. is recommended.
DANGER RISK OF UNIT
BURSTING! DO NOT
STORE/OPERATE
UNIT IN FREEZING
ENVIRONMENTS!
0
3/4
93 1/4
(94)
6 TYP.
SPRAY BAR DIMENSIONS
 1 X 3.000 LONG SLOT
(16) PLACES
0
4
8
0 5
11 17 23 29 35 41 47 53 59 65 71 77 83 89 95
100
SPRAY BAR COVER DIMENSIONS
1 1/16
6
8 1/8
1/2
TRENCH MINIMU
M
DIMENSIONS

10 Mi-T-M®Undercarriage Wash System Operator's Manual
Figure 4: example wash-bay layout
PLUMBING CONNECTIONS:
1. Water supply line: Connect ¾” garden hose (not provided) from water supply line to the female garden hose
tting provided on top of holding tank.
2. Suction line: Connect tank and pump and the 2” water supply hose using the cam and groove connectors.
3. Discharge line: Run 1-1/2” pipe or hose from outlet of spray system to the undercarriage trench and spray
bar connection. Reduce down at the spray bar to meet the 1” FPT connection. (Pipe/hose must be rated for
minimum 200PSI).
INSTALLATION

Mi-T-MUndercarriage Wash System Operator's Manual 11
ELECTRICAL CONNECTIONS:
1. A qualied electrician must install the electrical system.
a. Verify electrical supply at power source is off.
b. Run water tight conduit:
i. From selector switch remote box to the undercarriage main control
panel.
ii. From local disconnect to undercarriage main control panel.
c. Using correct wire sizes, connect wiring below (See wiring diagram):
i. From selector switch remote box to main control panel (16GA
minimum).
ii. From main power from local disconnect to undercarriage main control
panel (See amp requirements in specications section to determine
wire size.)
d. Connect oat from holding tank into undercarriage main control panel
(See wiring diagram).
WARNING RISK OF
ELECTROCUTION!
ENSURE ALL
CONNECTIONS ARE
DRY AND THE POWER
SUPPLY IS OFF.
INSTALLATION

12 Mi-T-M®Undercarriage Wash System Operator's Manual
INSTALLATION

Mi-T-MUndercarriage Wash System Operator's Manual 13
IF "NO" WAS MARKED TO ANY OF THESE QUESTIONS, CORRECT THE SITUATION BEFORE OPERATING.
PRE-OPERATION CHECKLIST
STOP
TO ENSURE YOUR UNDERCARRIAGE WASH SYSTEM OPERATES SAFELY AND
EFFICIENTLY, COMPLETE THE PRE-OPERATION CHECKLIST BEFORE PROCEEDING.
Before proceeding, answer all the questions on this checklist. YES NO
CODES:
1. Does the electrical wiring meet all codes?
2. Does plumbing meet all codes?
LOCATION:
1. Is the unit located on a hard level surface?
2. Is the unit located in a large ventilated area?
3. Is the spray bar securely anchored and lined up underneath the cover?
4. Does the cover have enough clearance over spray bar to avoid deecting into spray bar when
vehicles drive over?
5. Is cover lined up over spray bar with nozzles centered in slots?
6. Is the photo-eye and selector switch remote box located in the proper location?
ELECTRICAL:
1. Is the unit properly grounded?
2. Does the power supply, voltage and amperage match the data plate?
3. Are the control oats and remote switch(es) properly installed?
4. Is the selector switch remote box wired in correctly?
PLUMBING:
1. Is the plumbing sized correctly?
2. Have all connections been tightened and been made properly.
3. Are all unions tightened?
GENERAL:
1. Have all operators using this unit read and understood this entire manual?
2. Has the unit been installed by qualied service people who followed the instructions listed in
this manual?

14 Mi-T-M®Undercarriage Wash System Operator's Manual
FILLING AND PRIMING SYSTEM
1. Turn on water supply line to holding tank. Water will begin to ll the holding tank through the oat valve. Allow
water to ll holding tank- oat valve will shut-off water when full and re-ll tank as water is used.
2. Open 2” supply valve between holding tank and pump. Slightly open ½” plug on top of pump to allow air to escape.
Tighten plug when water begins coming out of tting.
OPERATION GUIDELINES
1. Main Power switch allows control power to the system- enabling remote selector switch operation. Can be left on
at all times except when performing maintenance or for long term shut-downs.
2. Remote selector switch allows two operation modes:
a. Test: Undercarriage system turns on until selector switch is turned off. Green light turns on indicating
undercarriage system is on. Select Test for manual turning on and off of system and for initial testing of spray
system.
b. Operate: Undercarriage system will turn on and off with the photo-eye control. Green light becomes active on
remote box to indicate to operators photo-eye is currently active. (Warning if the undercarriage system will not
be used, keep selector switch off so personnel or vehicles will not trip the photo-eye and turn on system.)
3. Photo-eye operation: The photo-eye is a diffuse type sensor that sends out a light beam. It is able to sense objects
when this beam is returned to the sensor by bouncing of the object. The max range the photo-eye will sense is
10ft- the surface and nish of the object will affect the range. Initially Test photo-eye operation and location with
remote selector switch set to off.
a. Photo-eye top view:
b. Photo-eye indicator lights:
i. Yellow- Power Light: On when photo-eye has power. Should be on all the time.
ii. Green- Relay Light: On when photo-eye relay is on. In light mode (LT) an object sensed in front of the photo-
eye turns this relay on.
iii. Red- Margin Light: Indicates strong signal being sensed from the photo-eye. This light should also come on
when objects pass in front of the photo-eye. If it does not photo-eye needs to be cleaned or moved closer to
object. Use when setting photo-eye location.
c. Photo-eye light/dark switch: Keep set to LT (light mode). Relay turns on when object is in front of photo-eye.
d. Photo-eye sensitivity dial: Keep on maximum setting- fully clockwise.
4. PLC Program:
a. When Test is selected:
i. Green Light turns on indicating system is active.
ii. Pump solenoid opens.
iii. After short delay pump turns on.
iv. Pump remains on until selector switch is turned off.
v. After pump shuts off there is a short delay and solenoid closes.
b. When Operate is selected:
i. Green Light turns on indicating photo-eye is active.
ii. Objects passing in front of photo-eye will initiate start sequence:
1. Pump solenoid opens.
2. After short delay pump turns on.
OPERATION
LEDStatusIndicators
Light/Dark
Operate
Switch
Sensitivit
y
Adjustment

Mi-T-MUndercarriage Wash System Operator's Manual 15
3. Pump remains on as long as object remains in front of photo-eye.
4. When object is no longer in front of photo-eye delay timer is started~ standard is 15 seconds (adjustable
on PLC if needed). (This timer’s purpose is to give enough time for the vehicle to pull past the photo-eye
and all the way through the spray bar before the pump shuts off. If the photo-eye senses another object,
IE another vehicle it will reset.)
5. After delay timer is up pump shuts off.
6. After pump shuts off there is a short delay and solenoid closes.
5. Pump Solenoid: The purpose of the solenoid is to open when undercarriage system is running and close when it
is off. This prevents water from gravity feeding from holding tank, through the pump, and out the spray bar when
the system is off.
START-UP:
1. Turn Main power switch on.
2. Turn remote selector switch to Test. Pump will turn on and begin delivering water out of the spray bar.
3. Check pump motor direction is correct- swap motor wiring leads to change direction.
4. Check ow, pressure, spray pattern- adjust/plug nozzles as desired.
5. Turn remote selector switch to Operate. Move objects in front of photo-eye to check photo-eye and verify operation.
OPERATION:
1. System is ready for Operation: Users can select Test or Operate when ready to use the undercarriage system.
2. As water from the holding tank is used, water from the water supply will continue to ll up tank through the oat
valve as long as water supply is kept on.
3. Turn Selector switch off when undercarriage system will not be used.
Shut-Down: Turn either Selector switch to off, or main panel rocker switch off at any time to shut system off.
MAKE SURE SYSTEM IS SHUT-DOWN BEFORE WINTERIZING OR PERFORMING ANY MAINTENANCE.
DISCONNECT MAIN POWER FROM DISCONNECT BEFORE SERVICING CONTROL BOX.
WINTERIZING
Before performing maintenance or winterizing the equipment turn of main rocker switch panel.
For winterizing or long term shut-downs disconnect inlet and outlet ttings from pump and let water drain and empty
supply tank.
Remove plug at end of spray bar and drain water out.
OPERATION

16 Mi-T-M®Undercarriage Wash System Operator's Manual
TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE REMEDY
ELECTRICAL
No power at the Con-
trol Panel.
Power failure to the Control Panel. Check circuit breaker at power source or contact
your local distributor.
Improper or loose wire connections. Check wire diagram/schematic.
CENTRIFUGAL PUMP
Centrifugal Pump
motor will not start or
stops.
Circuit overload/breaker has tripped. Reset breaker or replace fuse at power source.
Improper or loose wire connections. Check wire diagram/schematic.
Improper or loose motor connections. Check and tighten connections.
Pump motor overload. Allow motor to cool. Reset overload.
Pump motor is defective. Replace motor.
Centrifugal Pump mo-
tor hums but will not
start.
Obstruction in pump. Remove obstruction.
3 phase motor supplied with Single
phase.
Have electrician check and correct.
Centrifugal Pump
won't prime.
Insufcient water in supply tank. Add water or adjust oats.
Air locked. Remove plug on top of pump.
Blocked suction line or strainer. Remove obstruction.
Air leak in suction piping. Correct air leak.
Motor rotation is backward. Have qualied electrician reverse rotation.
Pump is obstructed. Remove obstructions.
Insufcient voltage. Check voltage with voltmeter.
Centrifugal Pump has
noisy operation.
Insufcient incoming water ow. Blocked suction or strainer.
Air leak in suction piping. Correct air leak.
Improper mounting causing vibration. Ensure pump is mounted level with the unit base.
Debris in pump. Clean.
Centrifugal Pump has
low output.
Blocked suction line or strainer. Remove obstruction.
Air leak in suction piping. Correct air leak.
Plugged or restricted impeller. Correct restriction.
Low operating speed. Correct voltage.
Discharge line from pump is obstruct-
ed.
Remove obstruction.
Pump is not primed. See Priming Instructions, pg. 15.
Plumbing is obstructed or too small. Remove obstruction or use larger plumbing.
Scale buildup in metal piping. Clean or replace.
Motor direction is backward. Have qualied electrician reverse rotation.
SHAFT SEALS
Water is leaking at
pumps.
Damaged stationary shaft seal. Seal ran dry. Ensure seal chamber is lled with
liquid.
Short seal life. Unexpected temperature and chemi-
cal usage.
Replace.
WATER FLOW
Air shoots from Water
Outlet.
This is a common occurrence while
pump is priming.
Air will stop shooting from the water outlet when
pump is primed.
Make-up water will not
turn off.
Float rake stuck Repair or replace.

Mi-T-MUndercarriage Wash System Operator's Manual 17
TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE REMEDY
PHOTO-EYE
Power light not on Main control switch off Turn main control switch on
Green light always on Object in front of photo-eye Check photo-eye alignment, move objects if
necessary
Photo-eye dirty Clean photo-eye
In Dark mode Switch to Light mode
Not turning on pump Remote switch in wrong position Turn to operate for photo-eye operation
SPRAY BAR
Low ow Nozzles plugged Clean nozzles
Pump rotating wrong direction Swap motor leads at contactor to reverse rota-
tion
Water seeping out
when system off
Solenoid failure Clean or replace solenoid

18 Mi-T-M®Undercarriage Wash System Operator's Manual
STATEMENT OF WARRANTY
Mi-T-M warrants all parts (except those referred to below) of your new Undercarriage
Wash System to be free from defects in materials and workmanship for one year from
the date of original purchase.
Defective parts not subject to normal wear and tear will be repaired or replaced at
Mi-T-M's option during the warranty period. In any event, reimbursement is limited to
the purchase price paid.
EXCLUSIONS
1. Normal wear parts:
Seals Filters
O-rings Gaskets
2. Parts damaged due to:
-normal wear, misapplication, modications/alterations, abuse,
-operation at other than recommended speeds, pressures or temperature,
-the use of caustic liquids,
-chloride corrosion or chemical deterioration,
-uctuations in electrical or water supply,
-operating unit in an abrasive, corrosive or freezing environment.
3. Parts damaged by failure to follow recommended:
-installation, operating and maintenance procedures.
4. This warranty does not cover the cost of:
-normal maintenance or adjustments,
-labor charges,
-transportation charges to Service Center,
-freight damage.
5. The use of other than genuine Mi-T-M parts will void warranty. Parts returned, prepaid
to Mi-T-M's factory or to an Authorized Service Center will be inspected and replaced
free of charge if found to be defective and subject to warranty. There are no warranties
which extend beyond the description of the face hereof. Under no circumstances
shall Mi-T-M bear any responsibility for loss of use of the unit, loss of time or rental,
inconvenience, commercial loss or consequential damages.

Mi-T-MUndercarriage Wash System Operator's Manual 19

20 Mi-T-M®Undercarriage Wash System Operator's Manual
Manufactured by Mi-T-M
50 Mi-T-M Drive, Peosta IA 52068
563-556-7484/ Fax [phone]