SERVICE MANUAL
The cam ring can develop sharp edges from wear.
Use a clean shop cloth to remove cam ring to avoid
cuts. Remove ring by lifting straight up.
17.
Remove front end plate and discard gaskets. Remove
locating pin.
18.
Remove housing-to-reservoir sealing gasket. Figure
21.
Fig. 21 Remove Gasket
1
Housing
2
Gasket
19.
Remove shaft oil seal with a screwdriver being careful
not to scratch seal bore or housing bushing, Figure
22.
Fig. 22 Remove Seal
1
Shaft Seal
CLEANING, INSPECTION AND REPAIR
Wash all components in a non-toxic solvent, air dry and
inspect individually as outlined below.
Component Inspection
Housing - Inspect drive shaft bushing in housing for
burning, scoring or oversize condition. The bushing is not
serviceable. If bushing is damaged, the housing must be
replaced.
Inspect ball plug located near the valve cap. If plug has
blown out, it can be driven back in to a depth approximately
6.35 mm (1/4 inch) below the cast surface.
Pump Cover - Inspect drive shaft bushing in cover for
burning, scoring or oversize condition. The bushing is not
serviceable. If bushing is damaged, replace cover.
Cam Ring - Inspect internal surface of cam ring for wear
or scoring. Polish in some areas is normal, but any wear
severe enough to raise a noticeable burr on the edge of the
cam ring I.D. indicates replacement is necessary.
Shaft and Carrier Assembly - Inspect carrier on the ends
of drive tooth faces for excessive wear or scoring. If ends are
worn or scored or wear pattern on any of the roll drive faces is
greater than 2.3 mm (.09 in.) in width, the carrier must be
replaced. Carriers are not serviced alone, but can be replaced
as part of a pumping element kit.
Inspect the shaft for any excessive wear, burning, or
scoring in the areas of the two bushings and the oil seal. If
any of these conditions exist, replacement is required.
Rolls - Inspect each of the twelve rolls for burning,
scoring, or wear on the O.D. surface. End Plates - Inspect
both end plates for wear, cracks or scoring on the surface
opposite
the
sealing
O-rings.
Any
scoring
indicates
replacement is required.
Flow Control Valve Assembly - It is difficult to visually
determine if a valve is defective. If the pump problem was
diagnosed as low pressure, and the pumping element shows
no sign of excessive wear, it is probable that the valve needs
replaced. The valve must fit and move smoothly in the valve
bore.
Pump Shaft Seal Installation
1.
Lubricate new shaft seal with same type of fluid as
used in pump. Place seal on top of seal bore with metal side
of seal upward.
CTS-4027 - Page 15
