6.
10. Lubrication of the M series liftgate should be as follows for all user conditions:
Area of Tailgate Type of Lubrication* Frequency
kicker roller asm Grease 50 cycles
Pump oil change see chart below yearly
Control handle pivots SAE 10 or 20 oil 50 cycles
Platform extension pivots SAE 10 or 20 oil 50 cycles
The major pivot points of the M series liftgate have special bushings that do not require
lubrication.
For -40 to 120 F use #0 Grade grease.
For -20 to 200 F use #1 Grade grease.
hYDRauliC FluiD ChaRt
Temperature
Range
-75 to 165°F
-20 to 130°F
-50 to 80°F
Acceptable
Fluids
Exxon Univis J-26
Dexron III
Exxon Superflo ATF
Shell Donax TG
Shell Aero Fluid 4
Mobil Aero hFA
Exxon Univis J-13
MIL h-5606
semi-annual inspection
1. Perform the procedures outlined in the Monthly Inspection and Maintenance.
2. Repaint original painted components as necessary to prevent rust and corrosion from
reducing structural integrity of original components.
3. Inspect pump motor by:
A. Disconnecting battery cable
B. Remove motor end cover
C. Examine the armature brushes for wear. (Brushes should be replaced if they are less
than 1/8” long).
D. Clean all residue out from inside of the motor housing.
E. Apply several drops of light weight machine oil to the armature shaft bearing in the
motor end cover and reassemble the motor end cover.
4. If the hydraulic oil in the reservoir is dirty:
A. Unfold platform and lower platform to the ground.
B. Drain the oil from the hydraulic system and flush the entire system.
C. Remove reservoir from pump and clean suction line filter. Also clean out any contami-
nants inside reservoir. Remount reservoir when completed.
D. Replace the oil as outlined in Section 9 under Monthly Maintenance and Inspection.
11. Check the pump relief pressure and also the motor amperage at this pressure. These val-
ues should be as follows:
Model Max. Amp. Draw Relief Pressure (psi)
M/MLB 25/30 ET 205 2500
M/MLB 25/30 EST 255 2650
MDC/MDCLB 25/30 ET 180 2000
MDC/MDCLB 25/30 EST 215 2000
