Troubleshooting - JBM 53880 Bedienungsanleitung

3
4
5
6
7
8
Remove the oil cap deposit
by pulling it out, using a cloth
if necessary.
Extract the oil of the deposit.
Fill the deposit with oil.
Place again the oil cap
deposit by pressing in.
Lift the chassis again, align
the tip of the tube with the
hole in the chassis and allow
it to lower slowly.
NOTE! You must perform this
step together with another
operator, who must hold the
lever down while you put
back the chassis on the floor.
Tighten the screw with
the key to fix the tank and
chassis in its original position.
· 8 ·
Adjusting the valve
Do not adjust the up/down lever control using the lock nut at the
end of the handle chain.
If nylon locking threads are removed from the screw threads,
rolling vibration will cause the nut to unscrew and fall off, leaving
the up/down lever unusable.
To make adjustments, use the lock nut located on the side of
the pump:
This feature was designed to ease the pallet truck adjustment.
Tools required are:
• Flat screwdriver
• 14mm wrench

TROUBLESHOOTING

Condition Probable cause
Hydraulic unit Oil low in tank
does not lift
Steel ball not seated
in hydraulic unit
Worn O-ring in ram
cylinder
Steel ball not seated
in hydraulic unit.
Worn O-ring in ram
cylinder.
Relief valve not
seated properly.
Relief valve not
adjusted properly.
Once lifted truck
lowers by itself
Oil leakage from
valve
REF. 53880
Corrective action
Make sure there
is no leakage from
valve and add oil.
See "Cleaning
relief valve" in this
manual.
Consult authorized
service center.
See "Cleaning
relief valve" in this
manual.
Consult authorized
service center.
See "Cleaning
relief valve" in this
manual.
Reload truck within
load capacity and
adjust valve by
pressure adjustment
screw:
Tighten plug of
valve.