Graco 312068M User Manual

3.

Using supplied bolts in the cylinder seal kits, press 
seal (16) into outlet flange (26). Ensure seal faces 
cylinder. Assemble bushing (13) throat seal (29) and 
gasket (17) into flange retainer (27) and fasten to 
outlet flange.

4.

Ensure plate is parallel with block. Carefully tighten 
screws until plate is flush with block. Be sure to 
press seal straight into bore.

5.

Insert piston rod (28) through throat seal (29) on 
front of block. Use grease to aid with insertion if 
needed.

6.

Place assembly in a vise, and tap piston rod (28) 
through throat seal (29) and bearing.

7.

Lubricate and assemble o-rings (1) to cylinder (12).

8.

Tap cylinder (12) onto piston rod (28) as shown in 
the following figure. Be careful to not score piston 
seal. Continue tapping cylinder until it seats in bore 
of outlet flange (26).

9.

Lubricate and assemble o-rings (2) to crossover 
tube (24). Insert crossover tube into outlet flange 
(26). Softly tap crossover tube into bore until it 
seats.

10. Carefully align cylinder (12) and crossover tube (24) 

to bores in pump base (23). Tap pump base until the 
cylinder is fully seated in bore.

11. Install four bolts (8) and washers (5). Torque to 45 

ft-lb (60.8 N•m).

Keep rod straight to prevent damage to throat seal.

26

TI9782a

16

29

17

27

13

TI9784b

Seal Alignment

Pressed Seal

TI9783b

TI9787a

TI9788a

Use grease to aid in insertion of cylinder onto pis-
ton rod.

TI9819a

TI9820a

TI9789a

24

26

TI9790a

23

12

24