P. 6
9)
Remove the keys (23A) and (23B).
10)
Remove the bearings (3) and the bearing lock pins (13) from the front and rear
housings. Removal is generally accomplished by destroying the bearing.
NOTE:
When removing the bearings be careful not to damage the bearing
bores.
11)
Remove any burrs on shafts and bearing bores by
polishing prior to reassembling pump.
NOTE:
This is important to insure the proper fit of
parts and the prevention of leaks.
Caution:
Do not reuse 0-rings, bearings and
retaining rings.When tightening the center housing bolts use a
star pattern torque sequence on the fasteners to insure even compression on the O-ring’s
surface. Repeat this process several times waiting between re-tightening. This is necessary
as the Teflon
®
will cold flow.
Bolt Size
Torque in-lbs (NM)
10-32 UNF
28 (3.2)
1/4-20 UNC
60 (6.7)
5/16-18 UNC
90 (10)
312, H12 and 314 Continued from Step 2
Caution:
The 312, H12 and 314 pumps weigh approximately 55 and 70 lbs (25 and 32
kg), respectively.
12)
Remove the six housing screws (4) and lockwashers (15) that secure the front
housing (8) to the center housing (21).
13)
Go to step listed above 6 through 9 listed above.
Front Housing
Rear Housing
