28
PUMP MAINTENANCE (CONTINUED)
B. IMPELLER CLEARANCE –
TO BRING THE PUMP BACK TO PROPER TOLERANCE, PROCEED
AS FOLLOWS:
1. Loosen four bolts (1B) and push pump
suction cover (1) into pump casing (5)
until pump suction cover hits the pump
impeller (3). Pump impeller should be
in full contact with pump suction cover.
2. Tighten eight bolts (5B), finger-tight.
Pump impeller should rub the pump
suction cover and not turn easily
through one revolution.
3. Tighten four bolts (1B), hand-tight,
until they touch the pump casing (5).
4. Back off eight bolts (5B) 3/4 turn.
5. Tighten four bolts (1B) 3/4 turn to
15 lb
-
ft (20 N•m) and tighten four nuts
(1N) to 15 lb-ft (20 N•m).
6. Tighten eight bolts (5B) to 15 lb-ft (20 N•m). Clearance gap should be about 0.040 in.
(1.00 mm). Check to see if pump impeller turns freely through one revolution.
C. CLEANING
1. To clean pump impeller (3), loosen the two Victaulic pipe clamps and remove suction pipe
assembly. The eye of the pump impeller can then be seen through the pump suction cover
(1) and is readily accessible for cleaning.
2. To further access pump impeller, remove eight bolts (5B) that hold pump suction cover (1)
in place. Remove pump suction cover, being careful not to damage O-ring (2).
3. To remove pump impeller, take the pump impeller wrench, which is stored in the tool box,
and position it so the hole is aligned with any of the eight tapped holes in the front of the
pump casing (5). The 90-degree leg of the pump impeller wrench should face inward,
toward the pump impeller and be positioned between any two of the pump impeller fins.
Bolt pump impeller wrench securely in place with one of the pump suction cover bolts
(5B). Using a pipe wrench on the pump shaft (9), unscrew pump impeller, turning pump
shaft in a clockwise direction. Be careful not to unscrew pump impeller too far before
removing the impeller wrench.
D. INSTALLING NEW SEAL ASSEMBLY
NOTE:
Do not unwrap new seal assembly until you are ready to install.
All parts of seal assembly are packed in sequence of installation.
1. To replace seal assembly (4), perform the steps under CLEANING, and remove pump
casing (5) by removing four bolts (7B) that hold the pump casing and pump casing
bearing (7) to pump frame (15).
2. After cleaning all parts, including pump shaft, begin reassembly of pump. Install seal
grease retainer (6) with the cavity portion of the seal facing inward. Rebolt pump casing
and pump casing bearing (7) onto the clutch housing using four bolts (7B). Using a light
oil lubricant (such as 3-in-1 oil), install the ceramic seat with its neoprene holder into the
seal recess, making sure it is square with the pump shaft. Lubricate the inside of the
bellows assembly with a light oil and check to make sure the steel ring is stuck (glued)
to the end of the assembly. Slide the bellows assembly onto the shaft and push until the
steel ring is against the ceramic seat.
Not
Here
Pipe
Wrench
PUMP
ENGINE-
CLUTCH
Figure 8 – Pump Impeller Removal
Содержание HydroSeeder T30
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