Graco 258771, Repair And Parts Manual

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Repair
3A0020B 5
5. Lubricate inside of cylinder (1) with hydraulic oil to
allow easy installation of piston assembly. Continue
to next step if the cylinder hasn’t been flushed and
there is residual hydraulic oil.
6. Install o-rings (2a) on seal housings (2). Lubricate
o-rings (2a) with hydraulic oil. Lubricate seals and
bearing inside seal housing with hydraulic oil.
7. Install one assembled seal housing (2) on cylinder
(1). Torque to 150-160 ft-lbs (203-216 N•m).
8. Install piston rod assembly (9) in cylinder (1) with
bidirectional seal (9b) facing away from the cylinder
(1). Apply hydraulic oil to bidirectional seal and
bearing (9c). Use rubber mallet to tap piston rod
assembly until the piston is approximately at the
middle of the cylinder.
9. Install second seal housing (2) on cylinder (1).
Torque to 150-160 ft-lbs (203-216 N•m).
NOTE: Use a rubber mallet to gently tap seal hous
ing while turning by hand to start threading the seal
housing into cylinder.
10. Apply pipe sealant on two elbow fittings (4) and pipe
plugs (5) and install in each seal housing (2).
NOTE: Elbow fitting should be placed in lowest port.
r_258640_3A0020A_6h
1
lubricate with
hydraulic oil
2a
2
r_258640_3A0020A_7h
lubricate with
hydraulic oil
1
2
r_258640_3A0020A_8h
r_258640_3A0020A_9h
9
1
9c
9b
r_258640_3A0020A_10h
1
2
r_258640_3A0020A_11h
4
4
5
5
5