Graco Inc 800-064, 801-641 manual Plungerswhenremovingto

NOTE: Threesizes	of metricwrenchesare		8. Lubricate each plunger and carefullyslide manifold
necessary	forservicingthe	pump; M30,	onto crankcase.
M10 and M 6 Allen wrench.			9. Replace theeightcapscrewsandsnugthem	up.
Valves:			Torque to 16 ft. Ibs. (2.2 K/m).
1 . Remove the hex plug (5)from manifold(6)using M30			NOTE: The eightcapscrewsmustbetorqued
wrench.
			evenly to apply equal pressure onthe
2. Examine O-ring (4)under plug and replace if cutsor			manifold so that it seatsproperly	and
distortion exist.			doesn't bind or jam. This is best done by
			torquing bolts closest to the center of the
3. Remove valve unit and O-ring (3)from cavity.			manifold first and then working out from
			those bolts.

NOTE: Valve unit may comeapartduring removal.

4. Replace valve unit with P/N 801 -472.

Servicing V-Packings:

NOTE: Use packing repair kit PIN 801 - 662 .

5. Replace hex plugand torque to75ft . Ibs. (10.3K/m).

NOTE: Hex plug should be re-torquedafter5					1. Afterremovingtheeightcapscrewsandthe
					manifold carefully pull packing retainer (14) from
	hours operation.				themanifold. Examine		O-ring (15)andreplace if
Pumping Section:					necessary.
					2. Remove low pressure packing (12) and head ring
1. Remove the eight Allen head cap screws (1) from
the manifold using the M6 Allen wrench.					(11).
2. Carefully separatethe manifold from thecrankcase.					3. Pull intermediate retainer ring(l3)from manifold,
NOTE: It may be necessary to tap manifold lightly					high pressure packing (12) and head ring (1 ).1
					4. Inspect all parts and replace if necessary.
	with mallet		loosen.
plungerswhenremovingto				15 . Thoroughly clean packing cavity in manifold and
Keep	manifoldproperlyaligned			with ceramic	NOTE: Ifjustthepackingsare'neededusekit
					801-662.	ringsorretainersneedIf
	or seals.			avoiddamage to	replacement use kit 801-664.
3. Carefullyexamineeachplunger(21)forany					examine. Lightly grease packing cavity.
scoring and replace if necessary.					6. Replace packing assembly in the following order:
ServicingPlungers:					headring(ll),packing(12),intermediatering(l3),
1. Loosenplungerretainingscrew(17)5-6turns,					head ring (11). packing (12), packing retainer(l41
using	"10	wrench.	Pushplungertowards		and O-ring (15).
crankcaseThis.		will	separateplungerand		CAUTION
retaining screw.
					Carefully study the location of each part andthe
2. Remove retainingscrewfromplungerand					position of the seals to assure proper reassembly
examine O-ring (19).back-up				ring(ZO), and copper	and operation.
bearing/gasket washer (18). Replace if necessary					7. Lubricate each plunger and carefully slide manifold
using plunger repair kit P/N 801-663.
3; Remove plungerfromplungerrodandremove					onto crankcase.
					NOTE: Whenreplacing
copper flinger (22). Clean or replaceif necessary.							.the manifoldonto
4. Lightly grease flinger and replaceit on plunger rod.					plungers,extremecautionshouldbe
					exercised to avoid damage to the seals.
5. Replace plunger.					8. Replace theeight	capscrews in themanifoldand

tighten as previouslydescribed(step 9 under

6. Lightlygreaseretainingscrewassemblytoavoidservicingplungers). cutting O-ring. Lightly grease outer end of plunger.

7.Installretainingscrewassemblyintoplungerand

torque to 14.4 ft. Ibs. (2 K/m).

8801-641

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