Product Manual

Page 10 of 12 PX05X-XXX-XXX-BXXX (en)
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2.
Major Valve.
Air Motor Section service is continued from Fluid Section
repair.
PILOT VALVE DISASSEMBLY
Remove (123) screws, releasing (103) covers, (121) wash-
ers, (118) actuator pins and (167) pilot piston.
Remove (170) spool bushing and inspect inner bore of
bushing for damage.
PILOT VALVE REASSEMBLY
Clean and lubricate parts not being replaced from service
kit.
Assemble (171) “O” rings to (170) bushing and assemble
bushing into (101) center body.
Lubricate and assemble (167) pilot piston assembly into
(170) bushing.
Assemble (173 and 174) “O” rings and (121) washers to
(103) covers, then insert (118) actuator pins through as-
sembly.
For PX05A-XXX-XXX-BXXX Models Only
5. Assemble (144) “U” cups (note the lip direction) and (103)
covers to (101) center body, securing with (123) screws.
NOTE: tighten (123) screws to 10 - 12 in. lbs (1.13 - 1.36
Nm).
For PX05R-XXX-XXX-BXXX Models Only
5. Assemble (144) “U” cups (note the lip direction) and (103)
covers to (101) center body, securing with (123) screws.
NOTE: tighten (123) screws to 4 - 6 in. lbs (0.45 - 0.68 Nm).
MAJOR VALVE DISASSEMBLY
Unthread (134) bolts, releasing (129) exhaust cover.
Pull (135) valve block and components from (101) center
body.
Remove (132) gasket, (141) valve plate and (140) valve
insert from (135) valve block.
For PX05A-XXX-XXX-BXXX Models Only
4. Remove (134) bolts, releasing (136) plug and (111) spool.
For PX05R-XXX-XXX-BXXX Models Only
4. Remove (134) bolts, releasing (107 and 136) plugs and
(111) spool.
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MAJOR VALVE REASSEMBLY
For PX05A-XXX-XXX-BXXX Models Only
Assemble new (139 and 138) “U” cups on (111) spool -
LIPS MUST FACE EACH OTHER.
Assemble (137) “O” rings to (136) large plug.
Insert (111) spool into (136) large plug, then insert (136)
large plug into (135) valve block, being sure the (111)
spool is rotated to accept (140) valve insert.
Assemble (140) valve insert and (141) valve plate to
(135) valve block. NOTE: Assemble (140) valve insert with
“dished” side toward (141) valve plate. Assemble (141)
valve plate with identication dot toward (132) gasket.
Assemble (132 and 200) gaskets, (135) valve block, (130)
gasket and (129) exhaust cover to (101) center body, se-
curing with (134) bolts. NOTE: Tighten (134) bolts to 15 -
20 in. lbs (1.7 - 2.3 Nm).
For PX05R-XXX-XXX-BXXX Models Only
Assemble new (139 and 138) “U” cups on (111) spool -
LIPS MUST FACE EACH OTHER.
Assemble (137) “O” rings to (136) large plug.
Assemble (137 and 166) “O” rings to (107) small plug.
Insert (111) spool into (136) large plug, then insert (136)
large plug into (135) valve block, being sure the (111)
spool is rotated to accept (140) valve insert.
Assemble (107) small plug into (135) valve block.
Assemble (140) valve insert and (141) valve plate to (135)
valve block. NOTE: Assemble (140) valve insert with
“dished” side toward (141) valve plate. Assemble (141)
valve plate with identication dot toward (132) gasket.
Assemble (132 and 200) gaskets, (135) valve block and
(129) muer assembly to (101) center body, securing with
(134) bolts. NOTE: Tighten (134) bolts to 15 - 20 in. lbs (1.7
- 2.3 Nm).
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