Group 34, Uprights
SM 765, Nov ’06 Cylinder Removal, Shimming, Overhaul, and Replacement • 34-5-3
6. Disconnect cylinder mounting bolts and cylinder
base mounting bolts.
Use these steps in reverse to replace the cylinder. Check
Group 40 for hydraulic fitting tightening procedures. If
complete cylinder was torque hydraulic line bracket to 40-
45 N⋅m (30-33 ft-lb).
Lift and Secondary Cylinder
Removal and Replacement
Only piston-type lift and secondary cylinders must be
removed from the upright for overhaul. The cylinder gland
and rod can be removed for overhaul while leaving the
cylinder tube mounted on the truck.
1. Make sure the cylinders are completely collapsed and
pressure is released.
2. Tilt the upright to as near vertical as possible.
3. Using a hoist and lifting strap of adequate capacities,
lift the carriage to access the hydraulic lines at the
base of the cylinders.
CAUTION
!
CAUTION
!
Make sure hoisting equipment is of adequate
capacity and in good working order.
4. Disconnect and cap the hydraulic line from the base
of each cylinder. Remove the mounting bolts from
the manifold block.
5. Lower the carriage
6. Using a hoist and lifting strap of adequate capacities,
connect the lifting strap to the inner rail on standard
& Hi-Lo uprights and inner and intermediate rails on
triple-stage uprights.
7. Disconnect the cylinder guide bolts.
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