2. Remove casing O-ring (Ref. No. 39)
from outside diameter of volute (Ref. No.
41) flange.
A mechanical means of
supporting the volute
during this procedure is
recommended. The volute casting weighs
50 lbs.
3. Remove three 1/2-13 cap screws (Ref.
No. 40) holding volute to pump adapter
(Ref. No. 42). Slide volute out of adapter
machined pocket.
4. Replace worn parts as necessary.
NOTE: When replacing volute, attach new
volute gasket (Ref. No. 38) to new volute with
existing fasteners (Ref. No. 37).
NOTE: Before installing new parts, clean all
mating surfaces thoroughly.
5. Install volute aligning flange outside
diameter with adapter machined pocket.
Replace three 1/2-13 cap screws. Check
for interference between impeller face
and volute by slowly rotating engine
shaft. See SHIM ADJUSTMENT section
for procedure to set impeller clearance.
6. Inspect casing O-ring for cracks or tears,
replace if necessary. Install O-ring on
outside diameter of volute flange.
7. Slide engine sled and engine assembly
into casing, align outside diameter of
volute flange with casing machined
inside diameter, do not pinch casing O-
ring. Install four 5/8-11 hex bolts and
nuts. Tighten six 1/2-13 hex nuts
clamping engine sled in position.
IMPELLER STUB SHAFT BEARING
REPLACEMENT
These units are equipped with a permanently
lubricated impeller shaft ball bearing (Ref. No.
15). This bearing supports the radial and axial
loads produced by the impeller reducing the
load on the engine crankshaft bearings. The
bearing does not require lubrication but should
be inspected periodically for wear or water
damage from a leaking shaft seal. As part of a
maintenance schedule, the bearing should be
replaced periodically.
1. Refer to SLIDING ENGINE SLED
OPERATION section. Access impeller
as described.
2. Refer to MECHANICAL SEAL
REPLACEMENT section. Follow steps 1
through 3; remove impeller, impeller
shims, shaft sleeve, seal and seal plate.
3. Remove shaft washer.
4. Remove M10x1.5x30 cap screws (Ref.
No. 13) attaching bearing housing
adapter (Ref. No. 11) to engine (Ref. No.
18). Remove adapter from engine by
sliding away from engine disengaging
engine PTO shaft from impeller stub
shaft (Ref. No. 16). Do not lose shaft key
(Ref. No. 17).
5. On appropriate bearing press, press
stub shaft and bearing from bearing
housing adapter. Remove bearing from
stub shaft.
6. Replace bearing with equivalent ball
bearing. Reassemble bearing, stub shaft
and bearing adapter.
7. Insert shaft key into engine PTO shaft.
Align shaft key with stub shaft key way,
slide stub shaft, bearing adapter
assembly onto engine and secure with
fasteners.
NOTE: Apply a light coating of anti-seize
compound to shaft to prevent corrosion and
galling.
8. Replace shaft washer onto stub shaft.
Flat surface of shaft washer must face
impeller.
9. Replace seal plate, shaft sleeve, seal,
impeller shims and impeller, turn
clockwise to tighten. Refer to
MECHANICAL SEAL REPLACEMENT
section, follow step 12 and steps 14
through 19 for reassembly procedure.
CLEANING
These units are designed so that for most
cleanout or clogging problems it should not be
necessary to remove hoses or piping. The
suction area can be reached by removing two
threaded handles (Ref. No. 33) and removing
suction cleanout cover plate (Ref. No. 34) and
O-ring (Ref. No. 35). To reach the impeller
chamber or casing discharge areas follow
procedures described in SLIDING ENGINE
SLED OPERATION.
NOTE: When replacing cleanout cover plate,
carefully wipe clean all surfaces on which the
O-ring has contact. Also make sure the O-ring
is in position in its groove.
ENGINE (DRIVER)
1. For information pertaining to the engine,
engine service and engine parts, consult
the Engine Manual or contact the
nearest authorized service
representative or the engine
manufacturer.
2. Follow engine manufacturer’s operating
and maintenance procedures and
recommendations covered in the engine
manual.
3. Use tachometer-hour meter installed on
the engine to log operating hours. See
tachometer-hour meter instruction sheet
included for operating information.
Perform engine maintenance according
to recommended hour intervals listed in
engine manual.
4. Consult engine manual for engine
warranty information needed. Any
warranty issues concerning the engine
must be address through the engine
manufacturer. Warranty contact phone
number, website, Authorized Service
Representative listing and warranty
directions are listed in the engine
manual.
TRANSPORT TRAILER
Transport trailer supplied with pump must be
used and maintained according to procedures
and guidelines listed in trailer instruction
manual. Accessory parts, repair parts and
warranty claims should be directed through
trailer manufacturer.
4