Manitowoc Grove RT540E Service Maintenance Manual page 106

HYDRAULIC SYSTEM
rings. Pay attention to how each seal and ring is
installed to avoid installing replacement seals and
rings improperly.
12. Remove the O-ring and backup ring from the outside of
the head. Remove the wear rings, buffer seal, rod seal
and wiper ring from the inside of the head.
Inspection
1. Inspect the rod. There should be no scratches or pits
deep enough to catch the fingernail. Pits that go to the
base metal are unacceptable. Chrome should be
2-74
1
20
17
18
17
4
7, 8
16
Published 4-20-2015, Control # 502-01
RT540E SERVICE MANUAL
present over the entire surface of the rod. If lack of
chrome on rod, the rod should be replaced.
2. Inspect rod for straightness. Determine if it can be
straightened or must be replaced.
3. Inspect the head. Visually inspect the inside bore for
scratching or polishing.
unacceptable. Polishing indicates uneven loading, and
the bore should be checked for out-of-roundness.
4. Inspect the piston. Visually inspect the outside surface
for scratches or polishing, Deep scratches are
unacceptable. Polishing indicates uneven loading, and
the diameter should be checked for out-of roundness.
5. Inspect the barrel carefully for scoring. If barrel is
scored, it must be repaired or replaced.
11
19
13
3
15
14
5
2
Deep scratches
10
12
6
9
6744
FIGURE 2-39
are