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 (d) Inspect teeth of drive gear (7). Replace a
(3) Bar engine over until scavenging pump piston is at
defective gear.
top dead center.
(e) Examine the bracket (1) and spring for bend or
(4) Remove capscrews and bracket (1), then remove
break. Replace a defective bracket or spring.
spring.
(f) Inspect spindle (4) for straightness. Replace a
(5) Remove capscrews (5), cap (6), and spring.
bent spindle.
(6) Remove capscrew (11) and arm (10) from shaft (9).
(g) Inspect cap (6) and spring for wear, or damage.
(7) Remove capscrews (2) and spacer (3).
Replace a defective spring or cap.
(8) Remove cotterpin and nut (8). Tap the shaft (9) out
(h) Examine spacer for wear, burr, or out of-round.
of gear (7), and bearing (12). Remove key from shaft (9) and
Replace a defective spacer.
tag for reinstallation identification .
(12) Install the oil and water pump drive by reversing
(9) Remove oil fitting (17) from housing (13). Remove
the removal procedure, being sure that the drive gear (7)
capscrews, then lift out housing (13).
meshes properly, then bar engine over carefully to assure that
(10) Drive, or press sleeve bearing (12) out of housing
the drive turns freely. Install cover and inspection plates.
(13).
(11) Clean, inspect, and repair as follows:
(a) Wash all parts in clean fuel oil and wipe dry
3-17. Crankcase Breather
with a lint free cloth.
(b) Check that shaft (9) fits snugly in the sleeve
located on the front wall of the scavenging pump housing.
bearing (12). Replace a bearing that is loose.
Access to the screens is from inside pump housing, and they
should be cleaned when the scavenging pump is being
NOTE
serviced (para 3-16). The valves may be serviced at any
time.
Be sure the new sleeve bearing is provided
b. Removal and Disassembly.
with an oil hole. If not, use hole in
(1) Remove bolts and nuts securing flange (3, fig. 3-
housing as a guide, and drill an oil hole in
bearing.
workbench.
(c) Compare shaft against a straight edge for
straightness. Replace a bent shaft.
3-53
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