(2)
Install the thrust plates (9), loading seals (8) and seals (7) in front cover (4) and rear cover (5), using a little
light grease to aid their retention.
(3)
Place the rear cover (5) in a soft jawed vise with machined face up. Be sure that dowels (6) are in place
on body (1), then assemble body (1) to rear cover (5).
(4)
Insert the gears (10 and 11) into their respective bores in pump body (1).
(5)
To avoid damaging seal (13), place a protective sleeve over the drive shaft and gently press the front
cover (4) down onto the pump body (1).
(6)
Install the screws (3) and torque to 36-40 ft.-lbs.
4-7.2.3 Thermostatic Bypass Valve. (Figure 4-21C)
a.
Removal and Disassembly.
(1)
Unscrew union nuts (1, 2 and 3) and remove bypass valve (4), with piping assemblies (5, 6 and 7)
attached, from piping.
(2)
Remove piping assemblies (5, 6 and 7) from bypass valve (4).
(3)
Clamp the body (8) in a soft-jawed vise and remove screws (9) and lockwashers (10).
Figure 4-21C. Thermostatic Bypass Valve
4-90
