Maxon BMR-35 User manual

LIFT CORP.
11921 Slauson Avenue.
Santa Fe Springs, CA. 90670
[phone]
BMR-35
BMR-44
BMR-55
BMR-66
MAINTENANCE
MANUAL
CMAXON Lift Corp. 1997
M-94-21
REV. B
NOV. 1997

LIFT CORP.
11921 Slauson Ave.
Santa Fe Springs, CA. 90670
CUSTOMER SERVICE:
TELEPHONE [phone] TOLL FREE [phone]
FAX: [phone]
WARRANTY POLICY & PROCEDURE
NOTE: Check with Customer Service for updated versions
of Manuals on an annual basis.
NEW LIFTGATE WARRANTY
Term of Warranty: 2 Years from Date of In-Service
Type of Warranty: Full Parts and Labor
MAXON agrees to replace any components which are found to be defective during the first 2
years of service, and will reimburse for labor based on MAXON’s Liftgate Warranty Flat Rate Labor
Schedule. (Call MAXON Customer Service for a copy).
All claims for warranty must be received within 30 Days of the repair date, and include the
following information:
1. Liftgate Model Number
2. Liftgate Serial Number
3. Detailed Description of Problem
4. Corrective Action Taken, and Date of Repair.
5. Parts used for Repair, Including MAXON Part Number(s).
6. MAXON R.M.A. # and/or Authorization # if applicable (see below).
7. Person contacted at MAXON if applicable.
All warranty repairs must be performed by an authorized MAXON warranty station. For major
repairs, MAXON Customer Service must be notified and an “Authorization Number” obtained. Major
repairs would generally be considered repairs made to the structural assembly of the liftgate and/or
repairs not outlined in the MAXON Liftgate Warranty Flat Rate Schedule.
Major components (i.e. hydraulic pumps, cylinders, valves, or failed structural parts) must be
returned, freight pre-paid, prior to the claim being processed. To ensure timely processing of these
warranty claims, an R.M.A. (Returned Merchandise Authorization) number must be obtained from
MAXON Customer Service prior to the return of any defective part. Defective Parts must be returned
within 60 days of the claim date for consideration to:
MAXON Lift Corp.
16205 Distribution Way, Cerritos, CA 90703
Attn: RMA#__
MAXON’s warranty policy does not include the reimbursement for travel time, towing, vehicle
rental, service calls, oil, batteries, defects due to misuse or abuse, or loss of income due to downtime.
Fabrication of parts, which are available from MAXON, are also not covered.
MAXON’s Flat Rate Labor Schedule takes into consideration the time required for diagnosis of a
problem.
PURCHASE PART WARRANTY
Term of Warranty: 1 Year from Date of Purchase
Type of Warranty: Part Replacement
MAXON will guarantee all returned genuine replacement parts upon receipt and inspection of
parts and invoice.

Table of Contents
WARNING ............................................................................................. PAGE 4
SERVICE TIME CHART........................................................................ PAGE 5
FOLDING CYLINDER REPLACEMENT ............................................... PAGE 6
LIFT CYLINDER BLEEDING................................................................. PAGE 7
LIFT CYLINDER REPLACEMENT ........................................................ PAGE 8
RUNNER REPLACEMENT ................................................................. PAGE 13
HYDRAULIC OVERRIDE LOCK ......................................................... PAGE 18
RELIEF VALVE PRESSURE SETTING .............................................. PAGE 19
PUMP VALVE OPERATION ................................................................ PAGE 21
OIL CHANGE INSTRUCTIONS .......................................................... PAGE 23
SOLENOID CHECK ............................................................................ PAGE 24
SWITCH AND HARNESS REPLACEMENT ....................................... PAGE 25
TROUBLESHOOTING.............................................PAGE 30
PLATFORM WILL NOT RAISE, MOTOR WON’T RUN ...................... PAGE 31
PLATFORM WILL NOT PICK UP RATED CAPACITY ........................ PAGE 32
PLATFORM RAISES HALFWAY & STOPS ........................................ PAGE 33
PLATFORM LOWERS UNEVEN ........................................................ PAGE 34
PLATFORM WILL NOT CLOSE .......................................................... PAGE 35
PLATFORM FOLDING SPEED ADJUSTMENT.................................. PAGE 37
PLATFORM WILL NOT UNFOLD ....................................................... PAGE 38
PLATFORM RAISES INSTEAD OF FOLDING ................................... PAGE 39
TROUBLESHOOTING GRAVITY DOWN................PAGE 40
PLATFORM WILL NOT RAISE, MOTOR RUNS................................. PAGE 41
PLATFORM WILL NOT LOWER ......................................................... PAGE 42
PLATFORM LOWERS SLOWLY......................................................... PAGE 43
TROUBLESHOOTING POWER DOWN..................PAGE 44
PLATFORM WILL NOT RAISE, MOTOR RUNS................................. PAGE 45
PLATFORM WILL NOT LOWER ......................................................... PAGE 46
PLATFORM LOWERS SLOWLY......................................................... PAGE 47

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 4
1. Read the Maintenance Manual and understand it thoroughly before any maintenance of
this unit is done.
2. Read the YELLOW urgent warning decal on the side of the vehicle close to the unit before
operating.
3. If decals are dirty, clean them. If decals are defaced or missing, replace them. Free replace-
ments are available from the manufacturer. See information at the end of the Warnings
4. Be aware that the safety and location of other people or objects should be considered
before operation of this unit. Stand to one side of platform while operating this unit.
5. Do not stand under, or have any foreign object under the Platform when lowering. Be sure
that the lowering of the Platform and/or Flipover will miss your feet!
6. Keep fingers, hands, arms, legs, and feet clear of moving parts when operating this unit.
7. If during your maintenance procedure, it becomes necessary to ride the platform, keep your
feet and any foreign objects clear of the rear edge of the platform. Otherwise your feet or
the foreign objects could become trapped between the edge of the platform and the vehicle
bed.
8. Inspect all Roll Pins monthly, to insure that they are not broken. Replace if broken.
9. Inspect all hydraulic hoses and fittings annually. Check for cracks and deterioration, and
replace if necessary.
10. Disconnect battery when replacing parts or servicing.
11. Do not allow children to ride, play with, or operate this unit.
12. In the event of an emergency while operating the unit, release the toggle switch and the unit
will stop immediately.
13. A properly installed Lift should operate smoothly and the only noise during the operation of
this unit should be from the Pump Unit during the raising of the Platform. Any scraping,
grating or audible indications of rough operation will need investigating. The cause will need
resolving before any further deterioration of performance occurs.
14. Use only Maxon Authorized Parts for replacement. Replacement parts should be ordered
from:
MAXON LIFT CORP. Parts Department
11921 Slauson Ave., Santa Fe Springs, Ca. 90670
Phone: [phone]
WARNING

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 5
SERVICE TIME CHART
DEMROFREPEBOTECIVRESDEMROFREPEBOTECIVRESDEMROFREPEBOTECIVRESDEMROFREPEBOTECIVRESDEMROFREPEBOTECIVRES .D'QEREMIT.D'QEREMIT.D'QEREMIT.D'QEREMIT.D'QEREMIT
)SRUOH(
REDNILYCTFILEGNAHCREDNILYCTFILEGNAHCREDNILYCTFILEGNAHCREDNILYCTFILEGNAHCREDNILYCTFILEGNAHC
EDISTHGIREDISTHGIREDISTHGIREDISTHGIREDISTHGIR00.200.200.200.200.2
EDISTFELEDISTFELEDISTFELEDISTFELEDISTFEL05.105.105.105.105.1
REDNILYCRESOLCMROFTALPEGNAHCREDNILYCRESOLCMROFTALPEGNAHCREDNILYCRESOLCMROFTALPEGNAHCREDNILYCRESOLCMROFTALPEGNAHCREDNILYCRESOLCMROFTALPEGNAHC 00.100.100.100.100.1
ROTOMEGNAHCROTOMEGNAHCROTOMEGNAHCROTOMEGNAHCROTOMEGNAHC 05.005.005.005.005.0
DIONELOSROTOMEGNAHCDIONELOSROTOMEGNAHCDIONELOSROTOMEGNAHCDIONELOSROTOMEGNAHCDIONELOSROTOMEGNAHC 05.005.005.005.005.0
ETELPMOC,KCAPREWOPEGNAHCETELPMOC,KCAPREWOPEGNAHCETELPMOC,KCAPREWOPEGNAHCETELPMOC,KCAPREWOPEGNAHCETELPMOC,KCAPREWOPEGNAHC 00.100.100.100.100.1
EVLAVEGDIRTRACNAELC/EGNAHCEVLAVEGDIRTRACNAELC/EGNAHCEVLAVEGDIRTRACNAELC/EGNAHCEVLAVEGDIRTRACNAELC/EGNAHCEVLAVEGDIRTRACNAELC/EGNAHC 05.005.005.005.005.0
RIOVRESERPMUPEGNAHCRIOVRESERPMUPEGNAHCRIOVRESERPMUPEGNAHCRIOVRESERPMUPEGNAHCRIOVRESERPMUPEGNAHC 05.105.105.105.105.1
REZILAUQEEDIREGNAHCREZILAUQEEDIREGNAHCREZILAUQEEDIREGNAHCREZILAUQEEDIREGNAHCREZILAUQEEDIREGNAHC 05.005.005.005.005.0
EVLAVFEILERLANRETXEEGNAHCEVLAVFEILERLANRETXEEGNAHCEVLAVFEILERLANRETXEEGNAHCEVLAVFEILERLANRETXEEGNAHCEVLAVFEILERLANRETXEEGNAHC 05.005.005.005.005.0
YLBMESSAHCTIWSS/OEGNAHCYLBMESSAHCTIWSS/OEGNAHCYLBMESSAHCTIWSS/OEGNAHCYLBMESSAHCTIWSS/OEGNAHCYLBMESSAHCTIWSS/OEGNAHC 05.005.005.005.005.0
REKAERBTIUCRICEGNAHCREKAERBTIUCRICEGNAHCREKAERBTIUCRICEGNAHCREKAERBTIUCRICEGNAHCREKAERBTIUCRICEGNAHC 05.005.005.005.005.0
)RENNURREP(SGNIRAEBRELLORROSRELLOREGNAHC)RENNURREP(SGNIRAEBRELLORROSRELLOREGNAHC)RENNURREP(SGNIRAEBRELLORROSRELLOREGNAHC)RENNURREP(SGNIRAEBRELLORROSRELLOREGNAHC)RENNURREP(SGNIRAEBRELLORROSRELLOREGNAHC 05.105.105.105.105.1
NOITCESNIAMMROFTALPEGNAHCNOITCESNIAMMROFTALPEGNAHCNOITCESNIAMMROFTALPEGNAHCNOITCESNIAMMROFTALPEGNAHCNOITCESNIAMMROFTALPEGNAHC 00.200.200.200.200.2
NOITCESGNIDLOFMROFTALPEGNAHCNOITCESGNIDLOFMROFTALPEGNAHCNOITCESGNIDLOFMROFTALPEGNAHCNOITCESGNIDLOFMROFTALPEGNAHCNOITCESGNIDLOFMROFTALPEGNAHC 00.100.100.100.100.1
)HCAE(YLBMESSANIAHCTROPPUSMROFTALPECALPER)HCAE(YLBMESSANIAHCTROPPUSMROFTALPECALPER)HCAE(YLBMESSANIAHCTROPPUSMROFTALPECALPER)HCAE(YLBMESSANIAHCTROPPUSMROFTALPECALPER)HCAE(YLBMESSANIAHCTROPPUSMROFTALPECALPER 05.005.005.005.005.0
SGNIRAEBEGNIHNOITCESGNIDLOFECALPERSGNIRAEBEGNIHNOITCESGNIDLOFECALPERSGNIRAEBEGNIHNOITCESGNIDLOFECALPERSGNIRAEBEGNIHNOITCESGNIDLOFECALPERSGNIRAEBEGNIHNOITCESGNIDLOFECALPER 05.105.105.105.105.1
SNIPEGNIHNOITCESGNIDLOFECALPERSNIPEGNIHNOITCESGNIDLOFECALPERSNIPEGNIHNOITCESGNIDLOFECALPERSNIPEGNIHNOITCESGNIDLOFECALPERSNIPEGNIHNOITCESGNIDLOFECALPER 57.057.057.057.057.0
)EDISREP(SNIPEGNIHNIAMECALPER)EDISREP(SNIPEGNIHNIAMECALPER)EDISREP(SNIPEGNIHNIAMECALPER)EDISREP(SNIPEGNIHNIAMECALPER)EDISREP(SNIPEGNIHNIAMECALPER 05.005.005.005.005.0
.SGNRBEGNIHMROFTALPNIAMECALPER.SGNRBEGNIHMROFTALPNIAMECALPER.SGNRBEGNIHMROFTALPNIAMECALPER.SGNRBEGNIHMROFTALPNIAMECALPER.SGNRBEGNIHMROFTALPNIAMECALPER
EDISREPEDISREPEDISREPEDISREPEDISREP00.100.100.100.100.1
SEDISHTOBSEDISHTOBSEDISHTOBSEDISHTOBSEDISHTOB05.105.105.105.105.1
)HCAE(SESOHCILUARDYHLANRETXEEGNAHC)HCAE(SESOHCILUARDYHLANRETXEEGNAHC)HCAE(SESOHCILUARDYHLANRETXEEGNAHC)HCAE(SESOHCILUARDYHLANRETXEEGNAHC)HCAE(SESOHCILUARDYHLANRETXEEGNAHC 52.052.052.052.052.0
RENNURNIESOHREDNILYCRESOLCEGNAHCRENNURNIESOHREDNILYCRESOLCEGNAHCRENNURNIESOHREDNILYCRESOLCEGNAHCRENNURNIESOHREDNILYCRESOLCEGNAHCRENNURNIESOHREDNILYCRESOLCEGNAHC 00.200.200.200.200.2
)EDISREP(REDNILYCTFILDEELB)EDISREP(REDNILYCTFILDEELB)EDISREP(REDNILYCTFILDEELB)EDISREP(REDNILYCTFILDEELB)EDISREP(REDNILYCTFILDEELB 05.105.105.105.105.1
ERUSSERPEVLAVFEILERDNAPMUPTESERERUSSERPEVLAVFEILERDNAPMUPTESERERUSSERPEVLAVFEILERDNAPMUPTESERERUSSERPEVLAVFEILERDNAPMUPTESERERUSSERPEVLAVFEILERDNAPMUPTESER 05.005.005.005.005.0
SSENRAHHCTIWSELGGOTRENNUREGNAHCSSENRAHHCTIWSELGGOTRENNUREGNAHCSSENRAHHCTIWSELGGOTRENNUREGNAHCSSENRAHHCTIWSELGGOTRENNUREGNAHCSSENRAHHCTIWSELGGOTRENNUREGNAHC 05.205.205.205.205.2
SSENRAHEVLAVKCOLREDNILYCEGNAHCSSENRAHEVLAVKCOLREDNILYCEGNAHCSSENRAHEVLAVKCOLREDNILYCEGNAHCSSENRAHEVLAVKCOLREDNILYCEGNAHCSSENRAHEVLAVKCOLREDNILYCEGNAHC 05.105.105.105.105.1

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 6
FOLDING CYLINDER REPLACEMENT
1. Lower the Platform to the ground.
2. Disconnect and plug the Hydraulic Hose from the lower part of the Cylinder
(for cleanliness).
3. Remove the Lower Roll Pin from the Inside Coupling and then remove the
Lower Cylinder Pin.
4. Remove the Upper Roll Pin from the Runner Weldment and then remove
the Upper Cylinder Pin.
5. Replace the Cylinder and reverse these steps for re-assembly.
NOTE:
Be sure the new Cylinder has a 1-3/4” Outside Diameter Rod
End. This will ensure that the correct cylinder is being used.
HYDRAULIC
HOSE
UPPER ROLL PIN
UPPER
CYLINDER PIN
LOWER
CYLINDER PIN
LOWER ROLL PIN
RUNNER
WELDMENT

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 7
LIFT CYLINDER BLEEDING
NOTE: This operation must be performed in a location where the maximum
distance of 60” between the ground and the vehicle bed may be obtained.
1. Lower the opened platform to the ground.
2. Loosen, but do not disconnect
the Cylinder Fitting from the
Pressure Compensated Flow
Control Valve, located at the top of
both Lift Cylinders.
3. Activate the “RAISE” switch
for approximately one second
and then release the switch.
Wait ten seconds and repeat.
Repeat this procedure until
there is no air leaking from the
loosened fittings, then tighten
those fittings.
4. Raise and lower the platform to see if
the unit operates smoothly. If so, raise,
fold, and store the Platform.
Pressure Compensated
Flow Control Valve
Cylinder Fitting

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 8
LIFT CYLINDER REPLACEMENT
1. Raise the open Platform about 20” above
the ground. Place a jack under the Platform
and raise an additional 3” or 4”. Measure the
distance between the Cylinder Pins and
record this distance for later use.
2. Remove the Column Cover from the top
of the Column.
?
COLUMN
COVERS
NOTE:
If your unit was one of the first in
production, it came equipped with an
Extension Tube Assembly (shown
below Left). If so, skip Step 3 and go to
Step 9. If your unit has no Extension
Tube Assembly (shown below Right),
then proceed with Step 3.
EXTENSION
TUBE
VALVE
BLOCK
COIL
NUT
LOCK VALVE
& COIL
3. Remove the Coil Nut from the
Lock Valve & Coil. Slide off the
Coil and unscrew the Valve
Cartridge (screwed into the
Valve Block). Remove the bolts
(if any), that secure the Valve
Block to the Column.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 9
VALVE
BLOCK NUT
4. Remove the Nut from the Elbow on the top
of the Cylinder. Loosen, but do not remove the
Nut on the Elbow of the Valve Block.
NUT
5. Remove the Roll Pin & Pin that fastens the
Rod End of the Lift Cylinder to the Runner
Assembly. Using a device such as a Chain
Hoist, hold the Lift Cylinder while removing the
upper Roll Pin & Pin. Remove the Lift Cylinder
from the top of the Column.
CHAIN
HOIST
LIFTING
CYLINDER
COLUMN
RUNNER
ASSEMBLY
PIN
PIN
6. Remove the Plug from the
compression fitting on the New Lift
Cylinder. Fasten a Drain Hose with a
1/4” NPT Female end to the
compression fitting. Place the other
end of the Hose in a 1 gallon
container for bleeding. Pull the Rod
End of the Cylinder until the distance
between the Pins are the same as
measured in Step 1. Re-attach the
Hyd. Lock Valve and Pressure Comp.
Valve with all their fittings.
NOTE: Be sure the arrow on the
Pressure Comp. Valve is pointing up.
LIFT
CYLINDER
DRAIN
HOSE
HYD. LOCK,
PRESS. COMP.
VALVE
LIFT CYLINDER REPLACEMENT
?

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 10
LIFT CYLINDER REPLACEMENT
CHAIN
HOIST
LIFTING
CYLINDER
COLUMN
RUNNER
ASSEMBLY
PIN
PIN
7. Lower the New Lift Cylinder
through the top of the Column.
Fasten at the top with the Pin &
Roll Pin. Then fasten at the Rod
End of the Cylinder with the Pin &
Roll Pin.
VALVE
BLOCK CYLINDER
NUT
NUT
8. Re-connect the Nut to the Elbow on top of
the Cylinder. Re-install the Valve Cartridge,
Coil, and Coil Nut to the Hyd. Lock Valve.
Re-attach the Hyd. Lock Valve to the Column
(if needed). Re-connect the Cylinder Nut to
the Hyd. Lock Valve.
COIL
NUT
FOR UNITS SHIPPED IN EARLY 1994
9. Remove the Coil Nut from the Lock
Valve & Coil. Slide off the Coil and
unscrew the Valve Cartridge (screwed
into the Valve Block). Remove the bolts
(if any), that secure the Valve Block to
the Column. Loosen, but do not remove
the Nut on the Elbow of the Valve Block.
VALVE
BLOCK
COIL
NUT
LOCK VALVE
& COIL
NUT

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 11
LIFT CYLINDER REPLACEMENT
CHAIN
HOIST
LIFTING
CYLINDER
COLUMN
RUNNER
ASSEMBLY
PIN
PIN
10. Remove the Roll Pin & Pin that
fastens the Rod End of the Lift
Cylinder to the Runner Assembly.
Using a device such as a Chain
Hoist, hold the Lift Cylinder while
removing the upper Roll Pin & Pin.
Remove the Lift Cylinder from the
top of the Column.
VALVE
BLOCK
PRESSURE
COMP. VALVE
ELBOW
11. Remove the Tubing &
Connectors and discard them.
Remove the Elbow from the
Valve Block and replace it with
a new Elbow, #6M x 1/4 NPT
(P/N 260164). Fasten the
Pressure Comp. Valve to the
new Elbow. NOTE: Be sure
the arrow on the Pressure
Comp. Valve is pointing up.
TUBING &
CONNECTORS

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 12
LIFT CYLINDER REPLACEMENT
CHAIN
HOIST
LIFTING
CYLINDER
COLUMN
RUNNER
ASSEMBLY
PIN
PIN
13. Lower the New Lift Cylinder
through the top of the Column.
Fasten at the top with the Pin &
Roll Pin. Then fasten at the Rod
End of the Cylinder with the Pin &
Roll Pin.
VALVE
BLOCK CYLINDER
NUT
NUT
14. Re-connect the Nut to the Elbow on top
of the Cylinder. Re-install the Valve
Cartridge, Coil, and Coil Nut to the Hyd. Lock
Valve. Re-attach the Hyd. Lock Valve to the
Column (if needed). Re-connect the Cylinder
Nut to the Hyd. Lock Valve.
COIL
NUT
12. Remove the Plug from the
compression fitting on the New Lift
Cylinder. Fasten a Drain Hose with a
1/4” NPT Female end to the
compression fitting. Place the other
end of the Hose in a 1 gallon
container for bleeding. Pull the Rod
End of the Cylinder until the distance
between the Pins are the same as
measured in Step 1. Re-attach the
Hyd. Lock Valve and Pressure Comp.
Valve with all their fittings.
NOTE: Be sure the arrow on the
Pressure Comp. Valve is pointing up.
LIFT
CYLINDER
DRAIN
HOSE
HYD. LOCK,
PRESS. COMP.
VALVE
?

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 13
RUNNER REPLACEMENT
REMOVE OLD RUNNERS
1. Lower the opened Platform and let it rest on a
stand approximately 25” off of the ground. Be sure to
allow access to a forklift to position the Runner.
2. Remove the Bolts, Pins, Chain Arms, and
Covers from the Runners and Platform.
3. Use a Forklift to slide the Platform forward,
towards the cab of the vehicle approximately
6”, or enough to clear the Platform away from
the Runner Brackets. Raise the Runners
about 6” and slide the Platform away from the
cab far enough to create a workplace to
remove the Runners.
PINS
BOLTS
CHAIN
ARMS
COVER
4. Lower the Runners to the ground. Remove
the Upper and Lower Pad Assemblies, and
the two Tandem Assemblies.
TANDEM
ASSEMBLY
UPPER
PAD
LOWER
PAD

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 14
RUNNER REPLACEMENT
5. Remove the Pins from the old Runner,
(two Pins on the R.H. Runner, and one Pin
on the L.H. Runner). Do not remove the
Upper Cylinder Pin at this time. Activate the
Control Switch to the “UP” position to fully
retract the Lift Cylinders.
RUNNER
PINS
6. R.H. COLUMN ONLY remove the
Switch Mounting Bracket. Remove the
terminals from the Switch and release
the electric cable from the clamp
inside the hole.
SWITCH
MOUNTING
BRACKET CABLE
CLAMP
COVER
7. Remove the Spring Guard and
Harness in the channel of the Runner
Assembly. Remove the Hose from the
Closing Cylinder. Remove the 1” Dia.
Pin from the Rod End of the Closing
Cylinder and place the Closing
Cylinder aside.
CLOSING
CYLINDER
HOSE
SPRING
GUARD
NOTE:
If the Bed Height of the Vehicle is 54”
or more from the Ground, go to Step 9.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 15
RUNNER REPLACEMENT
VALVE
BLOCK
COIL
NUT
LOCK VALVE
& COIL
8. Remove the Column Cover from the top
of the Column. Remove the Coil Nut from
the Lock Valve & Coil. Slide off the Coil
and unscrew the Valve Cartridge (screwed
into the Valve Block). Remove the bolts (if
any), that secure the Valve Block to the
Column.
Remove the Nut from the Elbow on
the top of the Cylinder. Loosen, but do not
remove the Nut on the Elbow of the Valve
Block.
Using a device such as a
Chain Hoist, hold the Lift Cylinder
while removing the upper Roll Pin &
Pin. Raise the Cylinder until the Rod
End of the Cylinder clears the top of
the Runner.
9. Grasp the lower end of the Runner and
pull towards the centerline of the vehicle.
The Runner should be free of the Column
by now. Repeat for the other side.
COLUMN
RUNNER
DIRECTION
OF PULL

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 16
RUNNER REPLACEMENT
INSTALL NEW RUNNERS
10. Remove the remaining parts of
the two Tandem Roller Assemblies
from the Old Runners and place
them on the New Runners. The
remaining parts for each Tandem
Assembly consist of: (1) Roller
Bracket Weldment, (3) Roller Axles,
and (2) Mounting Brackets.
ROLLER BRACKET
WELDMENT
ROLLER
AXLES
MOUNTING
BRACKET
12. Replace the Upper and Lower Pads
on the front and back of the Runner.
PADS 13.FOR R.H. RUNNER ONLY,tiea10ft.
piece of wire to the electrical cable that
was removed from the Switch. Insert the
opposite end of the wire through the
bottom of the Runner and bring it out
through the Switch opening in the Runner.
11. Position the New Runner into the Column.
Replace the Rollers on the Roller Axles and
fasten them with the Washers and Nuts. Be
certain the Roller Axels are positioned against
the Roller Bracket Weldment so they don’t rotate on the Bracket.
14. If the Lifting Cylinders were detached from the Column, replace them and
fasten them back to the top of the Column with the Pin and Roll Pin. Tighten
or replace any hydraulic fittings you may have removed from the top of the
Cylinder. Replace the Cover on the Column.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 17
RUNNER REPLACEMENT
RUNNER
PINS
15. Activate the “DOWN” switch on the
Control Panel to extend the Cylinders.
Attach the Lifting Cylinder to the Runner
with the Pin and Roll Pin. On the R.H.
Runner only, attach the fixed end of the
Closing Cylinder to the Runner with the Pin
and Roll Pin. Re-attach the Spring Guard
and Harness to the Runner.
16. Pull the electrical cables through the Switch Mounting Bracket hole and
tighten the Cable Clamp inside the Runner. Replace the wires to the switch
per the diagram below. Replace the Switch Mounting Bracket to the R.H.
Runner and re-connect the Hose to the Closing Cylinder.
17. Re-assemble the Platform to the Runners in reverse order.
RED
BLK
GRN
WHT

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 18
HYDRAULIC OVERRIDE LOCK
In the event that the BMR Column Lift will not lower, you will need to
disengage both of the Hydraulic Override Locks. There is one located at the
top of each Column.
To disengage, you must pull down on the Coil Nut and twist until it locks
into place. To re-engage you must twist the Coil Nut and release. It will spring
back into the original “Locked” position. Be sure to re-engage the Override
Locks before moving the vehicle.
COIL NUT
PULL DOWN AND
TWIST TO
DISENGAGE THE
LOCK

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 19
RELIEF VALVE PRESSURE SETTING
The Relief Valve pressure is set at the factory. If adjustment is needed,
use the following instructions to set the pressure per the table below.
1. For better access, remove the two
screws which fasten the Relief Valve
Assembly to the back of the Pump Box.
Remove the Hose from the Tee Fitting.
2. Attach a 0-3000 PSI gauge to the Tee Fitting.
Actuate the Control Switch to the “Raise” position.
Turn the Relief Valve Adjustment Screw to the
proper setting.
(Hint: Adjust the setting to approximately 300 psi
below the desired pressure, and slowly raise the
pressure until you reach the recommended
pressure shown in the table below.
SCREWS
TEE FITTING
HOSE
0-3000 PSI GUAGE
ADJUSTMENT
SCREW
OLD STYLE RELIEF VALVE
WARNING!
Setting the pressure higher than
recommended could result in
damage to your unit.
LEDOMLEDOMLEDOMLEDOMLEDOM.I.S.P.I.S.P.I.S.P.I.S.P.I.S.P
53-RMB53-RMB53-RMB53-RMB53-RMB05710571057105710571
44-RMB44-RMB44-RMB44-RMB44-RMB00810081008100810081
55-RMB55-RMB55-RMB55-RMB55-RMB00120012001200120012
66-RMB66-RMB66-RMB66-RMB66-RMB00420042004200420042

11921 Slauson Ave. Santa Fe Springs, CA. 90670 [phone] FAX [phone]
PAGE 20
RELIEF VALVE PRESSURE SETTING
NEW STYLE RELIEF VALVE
The Relief Valve pressure is set at the factory. If adjustment is needed,
use the following instructions to set the pressure per the table below.
1. Attach a 0-3000 PSI gauge to the Pressure Port.
Actuate the Control Switch to the “Raise” position. Turn
the Relief Valve Adjustment Screw to the proper setting.
(Hint: Adjust the setting to approximately
300 psi below the desired pressure, and
slowly raise the pressure until you reach
the recommended pressure shown in
the table below.
RELIEF VALVE
ADJUSTMENT SCREW
3000 PSI
GAUGE
WARNING!
Setting the pressure higher
than recommended could
result in damage to your unit.
LEDOMLEDOMLEDOMLEDOMLEDOM.I.S.P.I.S.P.I.S.P.I.S.P.I.S.P
53-RMB53-RMB53-RMB53-RMB53-RMB05710571057105710571
44-RMB44-RMB44-RMB44-RMB44-RMB00810081008100810081
55-RMB55-RMB55-RMB55-RMB55-RMB00120012001200120012
66-RMB66-RMB66-RMB66-RMB66-RMB00420042004200420042