Graco Inc. Hydra Clean 308532S - Manual (Page 12)

308532 12
Pump Service
Servicing the Seals and V--Packings
Disassembly:
1. Remove the manifold as described.
2. With crankcase side of manifold facing up, unscrew
the seal case from the manifold using a special key
wrench.
3. Remove o--ring from seal case.
4. Remove snap ring and low pressure seal from the
seal case. Seals are generally removed easily
without any tools.
5. High Pressure Seal Models: The high pressure
seal is generally easily removed from the manifold
without any tools. If extremely worn a reverse pliers
may be used.
6. V--Packing Models: The female adapter, two
v--packings and male adapter are easily removed
from manifold without tools. If extremely worn a
reverse pliers may be used.
Reassembly:
V--Packing Models:
1. Lubricate high pressure packing area in manifold.
2. Insert male adapter with notches down and “v” side
up.
3. Lubricate v--packings and install one--at--a--time with
grooved side down.
4. Next install female adapter with grooved side down.
5. Examine seal case o--ring and replace if worn.
Lubricate new o--ring before installing.
6. Thread seal case into manifold and tighten with key
wrench.
High Pressure Seal Models:
1. Lubricate seal area in manifold.
2. Carefully square seal into position by hand with the
metal grooved side up.
3. Examine seal case o--ring and replace if worn.
Lubricate new o--ring before installing.
4. Next secure high pressure seal into position by
threading seal case into manifold. Tighten seal case
with key wrench.
Low Pressure Seal--All Models:
1. Examine seal for wear or broken spring and lace if
necessary.
2. Install low pressure seal in seal case with garter
spring down.
3. Reinstall snap ring. Be certain snap ring is a tight fit.
Replace if it can be easily turned.
4. Replace manifold on pump as described and torque
per chart.
Servicing Crankcase Section
1. While manifold, plungers and seal retainers are
removed, examine crankcase seals for wear.
2. Check oil level and for evidence of water in oil.
3. Rotate crankshaft by hand to feel for smooth bearing
movement.
4. Examine crankshaft oil seal externally for drying,
cracking or leaking.
5. Consult factory or your local distributor if crankcase
service is evidenced.
Torque Chart
Pump Part Thread Tool Size Torque
Plunger
Retainer
M5 11 mm hex 80 in. lbs.
Manifold M8 x 1.25
M10 x 1.25
M10
13 mm hex
17 mm hex
17 mm hex
125 in. lbs.
217 in. lbs.
217 in. lbs.
Valve
Covers
— 24 mm
27 mm
75 ft. lbs.
75 ft. lbs.