Service Manual

Inspection 4. Remove rod assembly from vise.
CAUTION
Use eye protection such as goggles when using
compressed air
1. Wash all parts in solvent. Dry parts with compressed
air.
2. Inspect internal surface of barrel for deep scratches,
out–of–roundness
and bending. Replace if worn or
damaged.
3. Inspect rod, piston and head for excessive pitting,
scoring or wear
. Replace any worn or damaged parts.
Assembly (Fig. 20)
1. Coat new o–rings (items 7, 9, 12 and 13), back–up
rings (item 6, 8 and 1
1) and dust seal (item 4) with clean
10W30 engine oil. Carefully install sealing components
to the head and piston.
2. If removed, thread jam nut (item 2) and clevis (item1)
onto rod.
IMPORTANT: Do not clamp vise jaws against rod
surface. Protect rod surface before mounting in
vise.
3. Mount rod securely in a vise by clamping vise on the
flats o
f the rod clevis. Carefully slide piston and head as-
semblies onto the rod. Secure piston to shaft with lock-
nut.
IMPORTANT: Prevent damage when clamping the
barrel
into a vise; clamp on the pivot end only. Do
not close vise enough to distort tube.
5. Mount barrel in a vise so that the rod end tilts up
slightly
.
6. Coat all internal lift cylinder parts with a light coating
of clean 10W30 engine oil. Slide rod, piston and head
assembly into barrel being careful not to damage the
seals.
7. Secure head in barrel by installing retaining ring
(item 3).
8. Check that length of cylinder when fully extended is
from 1
9 to 19.5 in (48.3 to 49.5 cm) (Fig. 21). If needed,
loosen jam nut and adjust clevis position on rod to allow
proper cylinder length.
9. Make sure that jam nut is fully tightened after assem-
bly of lift cylinder
.
19 to 19.5 in
(48.3 to 49.5 cm)
Figure 21
Hydraulic
System
Greens Aerator Page 4 – 25 Hydraulic System