Troubleshooting - Vestil DRUM-55-S Operation & Service Manual

the forks don't lower.
C - If the jack don't descend when control lever (part # 1) is in the LOWER position, turn the nut (part # 18)
clockwise until raising the control lever (part # 1) lowers the forks. Then check the DRIVE position according to
item A and B to be sure the nut (part # 18) is in the proper position.
D - If the jack don't elevate while pumping in the RAISE position, turn the nut (part # 18)
counter-clockwise until the jack elevate while pumping in the RAISE position. Then check the
LOWER and DRIVE position according to item A,B, & C.
Maintenance and repair
Warning: Before performing any task, always block drive wheel off of the ground.
Consult the factory for problems at time of installation, or for any problems not addressed below.
Problem:
Lifting height is not longer achieved
Unit jerks when lifting
Carriage can't be lifted up
Carriage can't be lowered
Oil leakage
T
ROUBLESHOOTING
Possible cause(s):
Hydraulic oil level is too low
Air in the system
Without hydraulic oil
Oil has impurities
Oil has impurities
Piston rod & pump body is deformed.
Seals worn, cracked or damaged.
G -- ______
UIDE
Action:
Re-fill hydraulic oil when carriage is
all the way down.
Open vent screw on the lift cylinder
with carriage lowered all the way
down. Lift carriage with vent screw
open until oil is free from air bubbles.
Close the vent screw
Fill the oil
Change the oil
Change the oil and clean drift valve
Replace piston rod or pump body
Replace with new one.