Disassembly - Greenlee fairmont H8508 Instruction Manual

Disassembly

Complete disassembly of the tool is not recommended.
Return the tool to your nearest authorized Fairmont
distributor or to the factory.
Skin injection hazard:
Oil under pressure easily punctures
skin, causing serious injury,
gangrene, or death. If you are injured
by escaping oil, seek medical
attention immediately.
• 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.
Do not disconnect tool, hoses, or fittings while the
power source is running or if the hydraulic fluid is
hot. Hot hydraulic fluid could 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"
to prevent pressure buildup. In case some
pressure has built up, loosen hoses, fittings, or
components slowly.
The disassembly procedure is divided into sections of
the tool. Complete disassembly of the tool is seldom
necessary. Disassemble only the areas necessary to
correct the problem. See Exploded View and Parts List
for identification of parts as they are removed.
Disassembly should be done on a flat, clean surface.
Some parts may fall free during disassembly. To prevent
part loss or damage, keep the tool as close to the
working surface as possible.
Inspect all parts as they are disassembled and mating
parts in the tool that are not removed for signs of dam-
age, wear, cracks, etc. Replace any parts which appear
to be damaged.
When disassembling tool for service it is recommended
that O-rings, back-up rings and gaskets be replaced.
Greenlee / A Textron Company
H8508 Hydraulic Impact Wrench
Quick-Change Chuck (See Figure 7)
1. Remove adapter (61) from retaining sleeve (50).
2. Press on thrust ring (52) to expose thrust ring lock
(51). Remove thrust ring lock (51) thrust ring (52)
and spring (53). Slide retaining sleeve (50) off anvil
(49) and remove the two steel balls (54).
3. Remove the second thrust ring lock (51) if anvil (49)
needs to be removed from hammer case cap (55).
Note: To prevent the loss of any steel balls, it is
recommended to perform this step over a clean,
empty container to catch any components that may
fall free.
Note: If either thrust ring (51) becomes sprung or
out-of-round during disassembly, discard and
replace with a new ring.
Hammer Case Components
1. Using flats provided on hammer case cap (55)
unscrew cap and remove from tool.
The remaining impact mechanism parts can now be
removed from tool (items 46, 47 and 48).
2. Remove spacer (45), thrust bearing (43) and thrust
washers (44) from hammer case cavity.
Motor (See Figures 6, 7, and 9)
1. Remove socket head cap screws (16) and pull
motor cap (6) from handle (1). Remove gasket (15).
If necessary, remove dowel pins (14).
2. Pull idler shaft (13) with gear (10) from handle.
Remove gear (10) from idler shaft (13). If necessary,
remove drive pin (12) and retaining clip (11) from
idler shaft (13).
3. Remove retaining clip (11) gear (10) and Woodruff
key (9) from drive shaft (8). Push drive shaft (8)
toward hammer case cavity and remove from handle
(1).
Bearing Replacement
Note: If bearings in motor cap (6) or bearings in
handle (1) are damaged or worn, Fairmont recommends
replacing the component as an assembly with the
bearings already pressed in or return it to Fairmont
for repair.
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4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070