Raymond 8210 - Symptom Tables: Lift;Lower System; No Lift, Lift Motor Does Not Run, Travel Is OK

Section 5. Troubleshooting Model 8210/8250 Maintenance Manual
Symptom Tables: Lift/Lower System
5-18 Publication: 1146945/001, Revised: 25 Sep 2018
Symptom Tables:
Lift/Lower System
NOTE: If it is determined that a component
failed as a result of hydraulic fluid
contamination, replace the failed
component and flush, fill, and bleed the
hydraulic system. See “Hydraulic Fluid”
on page 7-95.
N
OTE: Use these symptom tables in
conjunction with the electrical
schematics and hydraulic schematics.
No Lift, Lift Motor Does Not
Run, Travel is OK
Possible Cause Action
Bad lift pump contactor With the main ON/OFF switch ON and the lift switch depressed, do
the main contactor (MPC) and the pump contactor (LPC) energize?
If not, measure the voltage between the pump contactor coil
terminals. If B+ voltage is present, replace the pump contactor.
Bad VM With the main ON/OFF switch ON, the PIN-key code entered, the
green ON ( | ) key on the keypad pressed, and the lift switch
depressed, does the pump contactor (LPC) energize? If not, check
for lift input at the CAN (see “Service Display” on page 3-17). If no
input is detected, replace the VM.
NOTE: Check for mechanical problems in the handle head before
replacing the VM.
Bad wiring continuity or wiring shorts With the main ON/OFF switch OFF and the battery disconnected,
check for continuity and wiring shorts in the wiring harness or
cables.
Bad lift pump motor brushes... With the main ON/OFF switch ON, the PIN-key code entered, the
green ON ( | ) key on the keypad pressed, and the lift switch
depressed, does the pump contactor (LPC) energize? If YES,
measure the voltage between B– and the lift pump motor terminal.
If OK, check the lift motor brushes...
...or bad lift pump motor... ...if the brushes are OK, test the pump motor.
Property of American Airlines