Graco Inc 801-765, 800-076, 1020E manual Push, Use kit

SERVICE

Pump (Refer to Parts Drawing, Page 11)

NOTE: Three.sizesofmetricwrenches are

necessaryforservicingthepump;M13, M30. and M10.

Valves:

1.Remove the hex plug (1 6)from manifold(1 7)using M30 wrench.

2.Examine o-ring(15)under plug and replace if cuts or distortion exist.

3.Remove valve unit and o-ring(14) from cavity.

NOTE: Valve unit maycomeapartduring removal.

4.Replace valves with KitNo.801-472 if necessary.

5.Replace hexplugandtorqueto 7 5 ft. Ibs. (10.3 K/m).

NOTE: Hex plugshould be re-torquedafter 5 hours operation.

Pumping Section:

1.Removethe16capscrews(l2)fromthemanifolds using the M13 wrench.

7.Install retaining screw assembly into plunger and torque to 14.4 ft. Ibs. (2 K/m).

8.Lubricateeachplungerandcarefullyslide manifolds onto crankcase.

9.Replace the16 capscrewsandsnugthem up. Torque to 21.7 ft. Ibs. (3 K/m).

NOTE: The eightcapscrewsoneachmanifold must be torquedevenlytoapplyequal pressure on the manifoldso that it seats properly and doesn't bind or jam. This is best done by torquing bolts closest to the centerofthemanifoldfirstandthen

working out from those bolts.

Servicing V-Packings:

NOTE: Use packing repair 'kit P/N 801-769.

1. Afterremovingthe	1	6 capscrewsandthe
manifolds carefully	pull	packing retainer (30)from

themanifold.Examineo-ring(21)andreplaceif necessary.

2. Rem'ove low pressure packing (19) and head ring

2. Carefullyseparate	themanifoldsfromthe	(18).
		3. Pull intermediate retainer ring (31from manifold.
crankcase.
NOTE: It may be necessary totapmanifold		Remove long life ring (20).high pressure packing
		(1 9)and head ring (18).
lightly with mallet to loosen.		4. Inspect all parts and replace if necessary.
plungers-whenCAuTtoavoid removingto damage
Keep manifoldproperlyalignedwithceramic		NOTE: If justthe packingsareneeded	use kit
		801-769Ifringsorretainersneed.
or seals.		replacement use kit 801-770.

5. Thoroughly clean packing cavity in manifold and

3. Carefullyexamineeachplunger(27)foranyexamine. Lightly grease packing cavity. scoring and replace if necessary.

				6:Replace packing assembly in the followingorder:
Servicing Plungers:			(23) 5-6turns,	head ring (18). packing (19). longlifering		(20).
1. Loosenplungerretainingscrew				intermediate ring (31), head ring(18). packing(19).
using "10	wrench.	Push	plungertowards	packing retainer (30) and o-ring (21).
crankcaseThis.	' will	separateplungerand		CAUTION
retaining screw.
2. Remove retainingscrewfromplungerand				Carefully study the location eachof part and the
				positionoftheseals	to assureproper
examine o-ring (29) back-up ring (28) andcopper				reassembly and operation.
bearing/gasket washer (24). Replace if necessary
using plunger repair kit P/N 801-474.				7. Lubricateeachplungerandcarefullyslide
3. Remove plungerfromplungerrodandremove
				manifold onto crankcase.
copper flinger (26). Clean or replace if necessary.				NOTE: Whenreplacingthemanifoldonto
4. Lightly grease flingerand		replaceit on plungerrod.				be
				plungers,extremecautionshould
5. Replace plunger.				exercisedtoavoiddamagetothe		seals.
				8. Replace the 16 capscrews in themanifoldsand
6.Lightly grease retaining screw assembly to avoid
				tightenaspreviouslydescribed(step9under
cutting o-ring;Lightlygrease outer endof plunger.				servicing plungers).
16 801-765

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