Assembly - Komatsu 730E Operation & Maintenance Manual

OM4035.2 02/03
Automatic Lube System

Assembly

®
Note: Use Loctite 242 (or equivalent) thread locker on
all torqued, threaded connections. Use extreme care to
prevent thread locker from flowing into adjacent areas
such as clearance fits and ball check. Allow a minimum
of 30 minutes cure time before operating pump.
1. Support ball bearing (8, Figure 3-10) inner race and
press eccentric (7) into bore. Install small retaining
rings (6).
2. Assemble crankrod assembly parts; large retaining
rings (4), inner weights (3), outer weights (2) and
install flat head screws (1). Tighten to 100 - 110 in.
lbs. (11.3 - 12.4 N.m) torque.
3. Using a new O-ring (10), install install plunger tube
(11) on outlet pin (9). Tighten to 100 - 110 in. lbs.
(11.3 - 12.4 N.m) torque.
4. Assemble the wrist pin anchor (14), backup washer
(15), cup seal (16) and plunger link rod (17) onto
plunger tube (11). Tighten to 100 - 110 in. lbs. (11.3
- 12.4 N.m) torque.
5. Assemble spring (18), ball (19), and plunger (20) on
plunger link rod (17). Tighten plunger to 100 - 110
in. lbs. (11.3 - 12.4 N.m) torque.
6. Install reciprocating tube (21) onto wrist pin anchor
(14). Tighten to 20 - 25 ft. lbs. (27.1 - 33.9 N.m)
torque.
7. Install cup seal (22), O-ring (23), cylinder (24), ball
cage (25), ball (26), O-ring (27) and check seat (28)
into reciprocating tube (21). Tighten check seat
housing to 20 - 25 ft. lbs. (27.1 - 33.9 N.m) torque.
8. Assemble crank rod assembly, to pump with bush-
ings (13) and button head screws (12). Tighten
screws to 100 - 110 in. lbs. (11.3 - 12.4 N.m)
torque.
9. Place pump subassembly (parts 1 through 28) into
pump housing (46).
10. Install new O-ring (54), backup washer (53) and O-
ring (52) and bronze bushing (51) into housing tube
(55).
11. Install housing tube assembly onto pump housing
(46). Be certain reciprocating tube (21) is inserted
through both bushings. Using a .75 in. (19 mm)
diameter rod through the inlet holes at bottom of
tube, tighten to 20 - 25 ft. lbs. (27.1 - 33.9 N.m)
torque.
12. Install shovel plug (56) and retainer (57).
13. Install new backup rings (47), O-rings (48 & 49), and
outlet pin nuts (50). Tighten to 30 - 35 ft. lbs. (40.7
- 47.5 N.m) torque.
14. Install gasket (41) and motor (42) on pump housing
(46). Install washers (43) and socket head screws
(44).
15. Install shovel plug (56) in housing tube (55). Install
retaining ring (57).
16. Install gasket (31), cover (30) and six self-tapping
screws (29), on pump housing.
17. Using new O-rings (40), install manifold (37) on
motor (42). Install socket head screws (33).
18. With the pump assembly in its normal operating
position, add SAE 10W-30 motor oil to pump hous-
ing until oil is level with bottom of pipe plug (45) hole.
Install pipe plug.
Maintenance - Section 4
Page 4- 25