Idiomas disponibles
Idiomas disponibles
Bright Forklift
PROBLEM:
Mast lifts load slowly or to
partial height.
Mast jerks or has
spongy movement.
BD3–7570
PROBLEM CAUSE:
1. Low on oil.
2. Mast cylinder seal failure.
3. Relief valve setting
too low.
4. Mast rollers shimmed too
tight, rails are off center or
not lubricated, defective
rollers.
1. Air in the
hydraulic system.
2. Bent or damaged
cylinder rod (piston).
3. Defective relief valve.
4. Rollers defective or
shimmed too tight.
Mast Troubleshooting Guide
CORRECTIVE ACTIONS:
1. Check the truck's hydraulic
system: low oil level,
defective pump, damaged
control valve or leaks in
supply line. Make repairs
as required.
2. Replace the seals.
Failure caused by oil
contamination requires the
system be flushed, filters
be replaced and fresh oil
installed.
3. Adjust relief valve,
do not exceed
recommended setting.
4. Check rollers and rail
alignment. Repair, adjust
or lubricate as necessary.
1. Check hydraulic oil level in
the tank, check for vacuum
leaks in the hydraulic
system. Bleed the lift
cylinders.
2. Repair or replace
as necessary.
3. Remove and inspect
the relief valve, repair or
replace as necessary. If
damaged by contaminated
oil: flush the system,
replace the oil filters and
add fresh oil.
4. Re-shim or repair
as needed.
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