Graco 2525DD, Instructions Manual

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18
PUMP SERVICE: 2525 MODEL
PRESSURE WASHERS
Repair kits are available. See the Parts List, page 24.
For the best results, use all parts in kits.
Follow Shutdown Procedure, page 13, to relieve system
pressure.
• Drain and refill pump after 25 hours of operation.
For Outlet Valves
1. Remove hex plug from the manifold using a 14mm
wrench.
2. Examine o-ring located under hex plug. Replace if cut
or distorted.
3. Remove valve assembly from cavity. The assembly
may come apart!
4. Install new valve, o-ring and hex plug. Torque to 14.75
ft-lb (20 Nm)
Note: Re-torque the plug after 5 hours operation.
For Inlet Valves
1. Remove 4 hex bolts from the manifold using a 6mm
hex bit.
2. Carefully separate manifold from crankcase. You may
have to lightly tap the manifold with a soft mallet to
loosen it.
3. Using a screwdriver, press valves out of the manifold
through the 3 holes located on the backside of the
manifold (look for the stainless valve seats through the
holes).
4. Remove the valve.
5. Install new o-ring. Then install new valve assembly.
Reinsert brass plugs.
6. Reinstall manifold to pump. Torque hex bolts to 14.75
ft-lb (20 Nm).
Servicing Plungers or Internal Bearings
1. Damage to the plungers or any internal parts in the
pump housing is considered a catastrophic failure
and is not recommended for service. Replace pump if
necessary.
Servicing V-Packings
1. Remove manifold as described in Valve Replacement
Section.
2. Remove white retaining ring, this may be stuck on the
piston.
3. Remove packing from manifold.
4. Inspect all parts and replace as necessary.
5. Thoroughly clean packing cavities and inspect for
damage.
6. Lightly grease packing cavities. Replace packings in
the following order:
• packing
• retainer ring
NOTICE
Packings must be installed in the proper order and
facing the correct direction. Improperly installed
parts will cause the pump to malfunction.
7. Remove brass retainer located around the piston.
8. Remove the outer and inner o-rings on the brass
retainer.
9. Replace o-rings, reinstall brass retainer around piston.
10. Reassemble manifold. Torque hex bolt to 14.75 ft-lb
(20 Nm).