Disassembly - Greenlee 48520 Service Manual

Disassembly

Complete disassembly of the tool is not recommended.
If a complete overhaul is necessary, return the tool to
your nearest authorized Greenlee Utility service center.
Skin injection hazard:
• Do not use hands to check for
leaks.
• Do not hold hose or couplers
while the hydraulic system is
pressurized.
• Depressurize the hydraulic system
before servicing.
Oil under pressure easily punctures
skin causing serious injury, gangrene,
or death. If you are injured by escap-
ing oil, seek medical attention
immediately.
Do not disconnect tool, hoses, or fittings while the
power source is running or if the hydraulic fluid is
hot. Hot hydraulic fluid can cause serious burns.
Procedure for connecting or disconnecting hydraulic
hoses, fittings, or components:
1. Move the flow lever on the hydraulic power
source to the off position.
2. Stop the hydraulic power source.
3. Follow the sequence under "Hose Connections"
in the Operation Manual to prevent pressure
buildup. In case some pressure has built up,
loosen hoses, fittings, or components slowly
Greenlee / A Textron Company
The disassembly procedure is divided into sections of
the tool. Disassemble only the section(s) necessary to
complete the repair.
Disassemble the tool on a flat, clean surface. Take care
not to lose or damage any parts that may fall free during
disassembly.
Inspect all parts as they are disassembled and mating
parts in tool that are not removed for signs of damage,
wear, cracks, etc. Replace any parts which appear to be
damaged.
When removing O-rings which must slide over sharp
surfaces, be careful not to damage the O-rings. Use a
rolling motion, and apply hydraulic fluid to ease removal
of O-rings if necessary.
Cutter Head
1. Remove hex nut (51), shoulder bolt (49), and guide
roller (50).
2. Remove hex nut (51) and shoulder bolt (63). Remove
connector link (48).
3. Remove socket head cap screw (60) and lock
washer (59). Remove bolt lock (56).
4. Remove elastic stop nut (58), hex head cap screw
(57), and shim (54). Remove shear blade (53).
5. Remove hex head cap screws (62), lock washers
(61), cutter hook (52), and cutter brace (55).
6. Loosen connector nut and unscrew cutter mount
(47) from extension tube (45). Remove O-ring (46).
Outer Extension Tube and Inner Pull Rod
1. Loosen jam nut (68) and remove outer extension
tube (45) from upper end actuator (27).
2. Remove retainer sleeve (44) and pin (43) from lower
extension rod end to disconnect the inner pull rod
(42).
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4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
48520 Pruner