Graco Inc. Hydra-Clean 800-638 - Manual (Page 19)

308–529 19
Servicing the V–Packings
NOTE: There are two types of packing kits: one is
packings only , the other includes the
packings, rings and retainers.
1. Remove the manifold as outlined in the Pumping
Section.
2. Carefully pull the packing retainer from the
manifold. Examine the o–ring and replace it if it is
cut or damaged.
3. Remove the v–packing and head ring. Pull out the
intermediate retainer ring. Remove the second
v–packing and second head ring.
4. Inspect all parts and replace as necessary.
5. Thoroughly clean the packing cavities and examine
for debris and damage.
6. Lightly grease the packing cavities and then
replace the packings in the following order: head
ring, v–packing, intermediate ring, head ring,
v–packing and packing retainer with the o–ring
installed in the retainer groove.
CAUTION
Install the parts in the proper order and facing the
correct direction. Improperly installed parts will
cause a malfunction.
7. Reassemble the manifold as instructed in
Servicing the Plungers.
ACCESSORIES
(Must be purchased separately)
DOWNSTREAM CHEMICAL INJECTOR KIT
800–117
For injecting harsh cleaning chemicals downstream
from the pump.
UPSTREAM CHEMICAL INJECTOR KIT
800–257
For injecting mild cleaning chemicals upstream into the
pump.
BACKFLOW PREVENTOR 801–133
Prevent back–up of contaminated water into fresh
supply. Install upstream of pump.
ANTI–FREEZE FLUSH KIT 802–327
For flushing system with 50% anti–freeze solution prior
to transporting or storing pressure washer in below
freezing temperatures.
INLET PRESSURE REGULATOR 800–258
Regulates inlet water pressure to 60 psi (4 bar)
maximum.
TECHNICAL DATA
Model 800–638 Model 800–690 Model 800–639
Engine (air–cooled, 4 cycle) 9 hp Honda OHV 9 hp Briggs & Stratton OHV 11 hp Honda OHV
Gasoline Tank Capacity 6.2 quarts (6 liters) 5 quarts (4.8 liters) 6.9 quarts (6.5 liters)
Water Pump Maximum Working
Pressure
2500 psi (172 bar) 2500 psi (172 bar) 3000 psi (207 bar)
Water Pump Maximum Flow 4 gpm (15 lpm) 4 gpm (15 lpm) 4 gpm (15 lpm)
Inlet Hose Connection 3/4” garden hose (f) 3/4” garden hose (f) 3/4” garden hose (f)
Weight 158 lb (70 kg) 158 lb (70 kg) 172 lb (78 kg)
Dimensions
Length
Width
Height
36” (914 mm)
21” (533 mm)
23.5” (597 mm)
36” (914 mm)
21” (533 mm)
23” (584 mm)
36” (914 mm)
21” (533 mm)
24” (610 mm)
Maximum Inlet Water Temperature 160 _ F (70 _ C) 160 _ F (70 _ C) 160 _ F (70 _ C)
Wetted Parts
High Pressure Hose
Bypass Hose
Pressure Washer
(including fittings)
Acrylonitrile and Buna–N cover and tube
Synthetic yarn and EPDM
Anodized aluminum, Aluminum or bronze alloys, Brass Copper, Nylon–
r
composite, Ceramic, Buna–N, Cotton phenolic, 303, 304, and 316 Stainless steel,
Polymide–12 thermoplastic, r , Carbon steel, Zinc with or without yellow
chromate plate
is a registered trademark of the DuPont Company .
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE
PTFE