24
TROUBLE CHART(Cont)
Trouble Cause Remedy
4) Body wil not stay
up.
4a) Loose hydraulic
connections.
4a) Check and tighten, or
replace.
4b) Cylinder or pis-
ton rings scored,
causing internal
leakage.
4b) Replace piston rings.
If cylinder barrel is
scored return cylinder to
DuraClass distributor for
repair or replacement.
4c) Control valve not
shifting com-
pletely.
4c) Adjust linkage for com-
plete shifting.
4d) Valve spool or
housing scored.
4d) Replace or repair valve
section of pump.
4e) Check valve not
seating properly.
4e) Reseat check valve. (Ref.
Service Bulletin No.
B72205-1072)
CYLINDER REPAIR
When any work is to be done on body or hoist and body is fully or
partly raised, body must have both props securely set or be blocked
securely so it cannot fall. In addition, the HOIST control lever must
be in neutral with the hoist lever lockout engaged in the "lock" posi-
tion and the PTO disengaged.
For any major repair the cylinder should be returned to DuraClass Dis-
trubutor.
Repairs in the eld should be limited to the replacement of packing which
can be done without removing the cylinder from the truck. Raise body,
observing CAUTION above, unscrew packing nut and remove packing.
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