Timing Device Assembly.

TM 9-2910-220-34

Housing cover

Check valve spring

Housing cover

Idler gear

Check valve

Supply pump housing

Check valve spring

Valve screw

Camshaft driven gear

Check valve

Relief valve

Drive shaft

Valve screw

Drive shaft

Relief valve spring

Idler gear

Figure 1-22. Fuel supply pump assembly (code B, C, D, E, late F

and G), sectional view.

Figure 1-21. Fuel supply pump assembly (code A and F),

sectional view.

1-16. Timing Device Assembly.

NOTE

1-15. Fuel Supply Pump Assembly (Code B, C, D, E,

The key letters shown in parentheses refer to

late F and G Injection Pumps).

figure 1-16.

NOTE

a. The timing device housing (AD) is an

The key letters shown below in parentheses

aluminum casting with mounting flanges at both

refer to figure 1-22.

ends. A bore in the housing guides and supports the

a. The fuel supply pump assembly consists of the

spider assembly (AH). A timing opening with cover

supply pump (B), camshaft driven gear (C), drive

(E) is located in the top of the housing and is used to

shaft (D), idler gear (E), housing cover (1), and

observe the position of the timing pointer (D) and

check valve (G).

the timing mark on timing device hub (C) during

b. The supply pump housing contains inlet and

enging and fuel pump timing.

outlet ports for fuel.

b. The timing device hub (c), with external left

c. The housing cover and cavity in the supply

hand helical splines for engaging the internal helical

pump housing form a compartment in which the idler

splines of the sliding gear (A), has a tapered bore

gear and drive shaft rotate.

and keyway. The hub is secured to the camshaft

d. Rotation for the supply pump drive shaft (D) is

extension by a Woodruff key, nut, and setscrew. Old

imparted by the fuel pump camshaft through the

style hubs have a circular flange extending

camshaft driven gear (C).

1-23