Repair
20
3A0411A
Torque Instructions
See F
IG
. 8 for fluid cover and air valve fasteners. See
F
IG
. 9 for manifold fasteners.
NOTE:
Fluid cover and manifold fasteners on the poly-
propylene pumps have a thread-locking adhesive patch
applied to the threads. If this patch is excessively worn,
the fasteners may loosen during operation. Replace
screws with new ones or apply medium-strength (blue)
Loctite or equivalent to the threads.
If fluid cover or manifold fasteners have been loosened,
it is important to torque them using the following proce-
dure to improve sealing.
NOTE:
Always completely torque fluid covers, then
torque the manifold pieces together, then torque the
assembled manifolds to the fluid covers.
Start all fluid cover screws a few turns. Then turn down
each screw just until head contacts cover. Then turn
each screw by 1/2 turn or less working in a crisscross
pattern to specified torque. Repeat for manifolds.
Fluid cover fasteners:
Polypropylene and Stainless Steel:
40-45 ft-lb
(54-61 N•m)
Aluminum:
55-60 ft-lb (75-81 N•m)
Manifold fasteners:
Polypropylene:
40-45 ft-lb (54-61 N•m)
Aluminum:
Refs 1-8:
11-21 ft-lb (15-28 N•m)
Refs 9-16:
55-60 ft-lb (75-81 N•m)
Stainless Steel:
Refs 1-4:
110-120 in-lb (12-13 N•m)
Refs 5-12:
40-45 ft-lb (54-61 N•m)
Retorque the air valve fasteners in a crisscross pattern
to specified torque.
Air Valve fasteners
Plastic Center Sections:
45-55 in-lb (5-6.2 N•m)
Aluminum Center Sections:
75-85 in-lb
(8.5-9.6 N•m)
Also check and tighten the nuts or bolts (X) holding the
manifold feet to the mounting brackets.
F
IG
. 8. Torque instructions, Fluid Covers and Air Valve Fasteners (all models, aluminum shown)
Fluid Cover Screws
Air Valve Screws
ti16558a
ti16560a
1
2
3
4
5
6
7
8
X
9
11
12
10
1
4
3
2
