Installation of Hydraulic Head Assembly.

TM 9-2910-226-34

(3) Refer to figure 3-121. Position compressor

and secure with two stud sleeves (A) and hydraulic

head nuts (B). Turn thumb screw (C) clockwise to

compress plunger spring seat. Install spring

retaining ring (D) using suitable pliers. Release

spring tension by turning thumb screw coun-

terclockwise and remove the compressor.

Figure 3-121. Installing tappet spring retaining ring

using compressor.

Figure 3-122. Installing hydraulic head assembly.

3-40. Installation of Hydraulic Head Assembly.

NOTE

Sub-paragraphs (2), (3), and (4) below apply

For proper selection of hydraulic head

to code F and G pumps only.

assemblies refer to table 3-2.

a. Assembly. The hydraulic head was inspected

(2) Refer to figure 3-123. Install filter screw

copper gasket (A) and oil filter (B) on filter screw

and assembled during repair (para 3-28).

b. Installation.

(D). Apply grease, Federal specification VV-P-236,

CAUTION

to filter screw packing (C), and install on oil filter

Do not force the hydraulic head into the

screw (D). Install oil filter screw and associated

housing. A slight pressure will be required to

parts. Torque tighten screw to 20-25 foot-pounds.

seat the preformed packings in the housing.

(1) Refer to figure 3-122. Position hydraulic

head assembly (A) on injection pump housing so

plunger sleeve slot faces opening, and aline slotted

tooth of plunger drive gear with arrow on injection

pump housing. Install four stud sleeves (B) and

hydraulic head nuts (C). Torque tighten nuts to 18-

20 foot-pounds.

Figure 3-123. Installing oil filter.

3-74