Graco Inc 802-777 Pump Service, Servicing The Plungers, 213,headring211,packing212,andpacking

PUMP SERVICE

~ A ~ ~ O ~ ~

To reduce the riskof serious bodily injury, including fluid injection, splashingthe eyes oron the skin,or injury from moving parts,always follow the Pressure Relief Procedure Warning on page 7 before proceeding.

NOTE: The following metric wrenches areneeded: M6 Allen wrench, M10, and M30.

A pump repair toolkit, P/N 800-271, is available. It includes packing, extractionand insertion tools

Repair kits are availableRefer. to the individual repairsections,and the parts pageformore details. For the best results,use all the parts in the kit.

Valves

. .

. ... , ...

, .: , ,_;: .. :

NOTE: To replace valves, order kit partno. 801- 472.

1.Remove the hex plug (205) from the manifold

(206)using anM30 wrench..

2.Examine the O-ring (204) under the plug and replace it if it is cutor distorted.

3.Remove the valve assembly(203)from thecavity; the assembly maycome apart.

4.Install a new valve (203). Install the O-ring (204) and plug (205) and torque'to75 ft-lb (10.3Nm).

NOTE: Retorque the plug after 5 hours of operation.

Pumping Section

1.Remove the eight Allenhead cap screws (201) and lockwasher (202) fromthe manifold (206) using a M6 Allen wrench.

2.Carefully separate the manifold from the crankcase. It may be necessry totapthe manifold lightly with a rubber mallet.

CAUTION
To avoid damaging the plungers or seals, keep
the manifold properly alignedwith theceramic	-
plungers when removingit.

3.Carefully examine each plunger (221) and replace it if there is anyscoring.

Servicing The V-Packings

NOTE: To replace just the v-packings, use kit part no. 801 -662 whichwill service the entire pump.

-To replace the v-packings, rings and retainers, orderthree ofkit partno. 801- 664 toservice the entirepump.

1.If the manifold is notalready removed, follow Steps 1 and 2of pumping section.

2.Carefullypull the packing retainer(214)fromthe manifold. Examine theO-ring (215) and replace it if it is cut or damaged.

3.Remove the v-packing(212)and head ring (211). Pull out the intermediate retainer ring (213). Remove the v-packing(212) and head ring (211).

4.Inspect all parts and replace as necessary.

5.Thoroughly clean the packing cavities and examine.

6.Lightly grease. the packing cavities and then replace the packings the followingorder: head

ring (211). v-packing (212). intermediate ring

(213),headring(211),packing(212),andpacking

retainer(214). with theO-ring (215) installed into the retainergroove.

order and facing the correct direction. See Figure 4. Improperly installed partswill cause a malfunction.

7.Reassemblethe manifoldas instructed inSteps 7 and 8 of Servicing The Plungers.

Servicing The Plungers

NOTE: Plunger repair kit, part no. 801-474, is available to service allthe plungers.

1.Loosen the plungerretaining screws (217). 5 to 6 turns, using anM10 wrench.Push the plunger

(221)toward the crankcase to separate the plunger and retaining screw.

2.Remove the screw (217) fromthe plunger and examine theO-ring (219).backup ring (220) and copper bearing/gasket washer (218). Replace these parts, if necessary,using kit partno. 801- 474.

3.Remove the plunger (221) and flinger (222)from the plunger shaft. Clean, examine and replace parts as necessary.

802-777 9