Service Manual

Reelmaster 7000- D Hydraulic SystemPage 5 - 151
Disassembly (Fig. 100)
1. Remove oil from lift cylinder into a drain pan by slowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
cylinder in a vise; clamp on the barrel end clevis
only. Do not close vise enough to distort the barrel.
2. Mount lift cylinder securely in a vise by clamping on
the barrel end clevis. Use of a vise with soft jaws is rec-
ommended.
3. Insert a screwdriver under the edge of the retaining
ring outside hook and using a spanner wrench, rotate
headclockwisetostarttheretainingringthroughthe
opening. Continue rotating the head clockwise to re-
move retaining r ing from barrel and head.
4. Remove plugs from ports. Extract shaft, head and
piston by carefully twisting and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Clamp on the clevis ONLY.
5. Mount shaft securely in a vise by clamping on the
shaft clevis. Remove lock nut and piston from the shaft.
Carefully slide head off the shaft.
6. Taking care to not scratch or damage the piston, re-
move piston seal, wear ring, and O- ring from the piston.
7. Taking care to not scratch or damage the head, re-
move O- rings, back- up ring, and head seal from the
head.
Inspection
CAUTION
Use eye protection such as goggles when using
compressed air.
1. Wash all lift cylinder components in solvent. Dry
parts with compressed air.
2. Inspect internal surface of barrel and external sur-
face of rod for deep scratches, out- of- roundness and
bending.
3. Inspect h ead and piston for excessive pitting, scor-
ing and wear.
4. Replace lift cylinder if internal components a re found
to be worn or damaged.
Assembly (Fig. 100)
1. Make sure all lift cylinder parts are clean before as-
sembly.
2. Coat new O- rings, back- up washer and other seals
with clean hydraulic oil.
A. Carefully install piston seal, wear ring, and
O- ring to the piston.
B. Carefully install back- up washer, O- rings, and
head seal.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Clamp on the shaft clevis ONLY.
3. Mount shaft securely in a vise by clamping on the
shaft clevis.
A. Coat shaft with clean hydraulic oil.
B. Slideheadontotheshaft.
C. Install piston onto the shaft and secure wit h lock
nut. Torque lock nut from 30 to 35 ft- lb (41 to 47
N-m).
D. Remove shaft assembly from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the barrel
clevis ONLY.
4. Mount barrel securely in a vise by clamping on the
barrel clevis.
IMPORTANT: When installing the head into the bar-
rel, pay careful attention to the retaining ring slot in
the barrel to insure that the piston and head seals do
not lodge in the slot.
5. Coat all internal parts with a light coat of clean hy-
draulic oil. Slide piston, shaft a nd head assembly into
the barrel being careful not to damage the seals.
6. Secure head in barrel by installing retaining ring.
Align retaining ring hole in the head with the access slot
in the barrel. Insert the retaining ring inside hook into the
hole and rotate head counter- clockwise until the retain-
ing ring is completely pulled into the barrel.
Hydraulic
System