Graco Inc 800-094, 801-888 manual Pump, Mote Three

SERVICE
Pump	(Refer to Parts Drawing, Page 11)
MOTE: Three		sizes	of metric	wrenches	are	7. Install retaining screw assembly into plunger and
	necessary for		servicing	the. pump;	M30,	torque to 14.4ft. Ibs. (2 K/m).
	M17,	andM6	Allen wrench.			8. Lubricate each plunger and carefully slide
Valves:
						manifold ontocrankcase.
1. Remove the hex plug (5)from manifold (6) using
M30	wrench.					9. Replace the six capscrews and snug themup.
						Torque to 16 ft. Ibs. (2.2 K/m).

2.Examineo-ring(4)underplugandreplace'ifcutsor

distortion exist.		NOTE: The six capscrews must be torqued
'3. Remove valve~unit	and O-ring (3) fromcavity.	evenly to apply equal pressure on the
		manifold so that it seats properly and
NOTE: Valve unit	may come apart during	doesn't bind or jam. This best doneby
		torquing bolts closest to the centerofthe
removal.		manifold first and then working out from
4. Replace valve unit with P/.N 801-472.		those bolts,
		'Servicing V-Packings:
5. Replace hex plug and torque to 72.ft3. Ibs. (10
		NOTE: Use packing repairkit P/N 801 -662.
K/m).
NOTE: Hex plug should be re-torqued after5		1. After removing thesixcapscrewsandthe manifold
hours operation. carefully pull packing retainer (12) from the
		manifold. Examine O-ring (13) and replace if
Pumping Section:		necessary.
1. Remove the six Allen head cap screws (1)from the		2. Remove low pressure packing(10)and head ring
manifold using the M6 Allen wrench.

2.Carefully separate the manifold from the crankcase.

NOTE: It may be necessary to tap manifold lightly with mallet toloosen.

CAUTION

Keep manifold properly alignedwith ceramic plungers when removing to avoiddamage to plungers orseals.

3.Carefully examine each plunger (19) for any scoring andreplace if necessary,

Servicing Plungers:

1.Loosen plunger retainiw screw (15) 5-6 turns, using "17 wrench. Push plunger towards crankcase. This will separate plunger and retaining screw.

2.Remove retaining screw from plunger and examine O-ring (17). back-up ring(18), and copper bearinglgasket washer(16). Replaceif necessary using plunger repair kit P/N'801-474.

3.Remove plunger from plunger rod and remove copper flinger (20).Clean or replace if necessary.

4.Lightly greaseflinger and replaceit on plungerrod.

5.Replace plunger.

6.Lightly grease retaining screw assembly toavoid cutting O-ring. Lightlygrease outer endof plunger.

3.Pull intermediate retainer ring(1 1)from manifold, high pressure packing(10)and head ring(9).

4.Inspect all parts and replace if necessary

NOTE: If just the packings are needed use kit 801-662. If rings or retainers need replacement use kit 801 -664.

5.Thoroughly clean packing cavityin manifold and examine. Lightly grease packing cavity.

6.Replace packing assemblyin the followingorder: head ring(9).packing (10).intermediate ring(1 1). head ring(9).packing (10).packing retainer (12). and O-ring (13).

CAUTION

Carefully study the locationof each partand the position of the seals to assure proper reassembly and operation.

7.Lubricate each plunger and carefully slide

manifold	ontocrankcase.
NOTE: When replacing the manifold onto
	plungers, extreme caution should be
	exercised to avoid damageto the seals.	. ..	. ,...
		, . .
8. Replace the six capscrewsin the manifold and		. . . .
tighten as previously described (step9 under
servicing	plungers).

10801-888