PUMP MAINTENANCE SECTION: (Reference Figures 5 and 6)
CAUTION:
Pump maintenance to be done only while engine is not
running, and battery cables are disconnected.
A. FACTORY-TOLERANCES.
1. To check pump tolerances loosen the two clamps on the pump suction piping and remove the inlet
elbow. Through the pump suction hole, insert a feeler gauge between the pump impeller (3) and the
suction cover (1). This measurement on a new pump is between .040-.045 of an inch (1.00-1.15
mm).
B. IMPELLER CLEARANCE -
To bring the pump back to proper tolerance, proceed as follows:
1. Push suction cover (1) into casing (5) until suction cover hits impeller (3). Impeller should be in
full contact with suction cover.
2. Tighten cap screws (5B) finger tight. Impeller should rub the suction cover and not turn easily
through one revolution.
3. Tighten cap screws (1B) to 15 lb. ft.(165 kg/m). Impeller should turn freely through one revolution.
4. Back off cap screws (5B) 3/4 turn.
5. Tighten cap screws (1B) 3/4 turn and tighten nuts (1N) to 15 lb.ft.(165 kg/m).
6. Tighten cap screws (5B) to 15 lb. ft. clearance gap should be about .040 inches (1.00 mm). Check
to see if impeller turns freely through one revolution.
NOTE:
Tightening of the cap screws should be in a criss-cross pattern.
DO NOT TIGHTEN TO OVER 15 LB. FT. (2.07 kg/m)
. Doing so
can crack the flange of the suction cover.
C. CLEANING.
1. To clean pump impeller (3), loosen the two victaulic pipe clamps and remove the suction pipe
assembly. The eye of the impeller can then be seen through the suction cover plate (1) and is
readily accessible for cleaning.
2. To remove impeller, remove the eight bolts (5B) holding the suction cover (1) in place. Remove
suction cover, being careful not to damage the O-Ring gasket (2).
3. Take the impeller wrench, which is stored in the toolbox, and position it so that the hole is aligned
with any of the eight tapped holes in the front of the pump casing (5). The 90˚ leg of the wrench
should face in towards the impeller and be positioned between any two of the impeller fins. Bolt
the wrench securely in place with one of the suction cover bolts (5B). Using a pipe wrench on the
shaft (11), unscrew the impeller turning the shaft in a clockwise direction. Be careful not to unscrew
the impeller too far before removing the puller wrench.
26
Содержание HydroSeeder T120
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