666300-XXX-C (en)
Page 5 of 8
22
21
19
27
1
61
26
5
6
7
14
2
29
196
22
21
19
15
60
26
9
3
ASSEMBLY TORQUE REQUIREMENTS
NOTE: DO NOT OVERTIGHTEN FASTENERS.
(14) screw, 65 - 70 ft lbs (88.1 - 94.9 Nm).
(26) screw, 60 - 70 ft lbs (81.3 - 94.9 Nm).
(27) screw, 60 - 70 ft lbs (81.3 - 94.9 Nm).
LUBRICATION / SEALANTS
Apply Key-Lube grease to all “O” rings, “U” cups and mating
parts.
Apply Loctite® 271™ to threads.
Apply anti-seize compound to threads and bolt and nut
flange heads which contact pump case when using stain-
less steel fasteners.
Not used with models 6663XX-9XX-C, 6663XX-EXX-C and
6663XX-GXX-C.
PARTS LIST / 6663XX-XXX-C FLUID SECTION
FOR THE AIR MO-
TOR SECTION, SEE
PAGES 6 & 7.
Figure 2
COLOR CODE
Diaphragm Ball
Material Color Color
Hytrel
Cream Cream
Nitrile
Black
Red (•)
Santoprene Tan
Tan
Santoprene Green*
N / A
(backup)
PTFE
White White
(-) Stripe
(•) Dot
* See item 8 in inset below.
PTFE
7
Santoprene
8
(
green when used
as a backer
)
View for 6663XX-XX4-C (PTFE dia-
phragm) configuration only.
Air side
Fluid side
Cross section view of diaphragms
Torque Sequence
3
2
7
5
1
8
6
4
9
10
