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309016

Pump Service — Models 804596 & 804597

AquaMax DD9023 & DD9021

6. Lightly grease the retaining screw and the outer

end of the plunger.  Place the washer, O-ring, and
backup ring around the screw, and install the nut
through the plunger.  Torque to 19.5 N-m
(14.4 ft-lb).

7. If you plan to replace the packings, see 

Servicing

the V-Packings at right.

8. Lubricate the outside of each plunger.  Slide the

manifold onto the crankcase, being careful not to
damage the seals.

9. Install the capscrews and washers fingertight.

Torque the screws to 30 N-m (22 ft-lb) following
the tightening pattern shown in Fig. 4.  Uneven
tightening could cause the manifold to bind or jam.

Fig. 4

1

4

2

3

5

8

7

6

9292A

Servicing the V-Packings

There are two types of packing kits: one is packings
only, the other includes the packings, rings, and
retainers.  See 

Pump Repair Kits on page 20.

1. Remove the manifold as outlined in 

Pumping

Section on page 14.

2. Carefully pull the packing retainer from the

manifold.  Examine the O-ring, and replace if 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 or damage.

6. Lightly grease the packing cavities, and 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 on page 14.

Summary of Contents for AquaMax 804594 A Series

Page 1: ...del 804597 Series A AquaMax DD9021 pressure washer with 11 hp engine and 900 liters hr 4 gpm pump on Hi Boy cart with hose gun and tips 210 bar 21 MPa 3000 psi Maximum Working Pressure Model 804596 Se...

Page 2: ...ents can inject fluid into your body and cause serious injury Fluid splashed in the eyes or on the skin can also cause serious injury D Fluid injected into the skin might look like just a cut but it i...

Page 3: ...ed by the fluid manufac turer FUEL HAZARD The fuel used in this unit is combustible and when spilled on a hot surface can ignite and cause a fire Do not fill the fuel tank while the engine is running...

Page 4: ...ge 7 If you are using a sandblaster kit see its separate manual for installation instructions Connect to Water Supply CAUTION Before you connect to the water supply check your local plumbing code rega...

Page 5: ...riggered Pressure at the gun may be significantly higher than the bypass pressure indicated on the pressure gauge Therefore always follow the Pressure Relief Procedure above regardless of the pressure...

Page 6: ...ap back against the engine Return it gently to prevent damage to the recoil mechanism NOTE For easier starting have one person start the engine while another person triggers the spray gun If the engin...

Page 7: ...ou spray again CAUTION To avoid blowing the O ring out of the quick coupler due to the high pressure in the system never operate the pressure washer without a tip securely mounted in the quick coupler...

Page 8: ...8 309016 Notes...

Page 9: ...ine level Fill as necessary After first 5 hours of operation Change engine break in oil Drain oil when warm Use SAE 30 or 10W 30 detergent oil After first 25 hours of operation Retorque exhaust manifo...

Page 10: ...type Clean adjust spark plug gap or replace Spray gun closed Trigger spray gun while starting Engine misses or lacks power Partially plugged air cleaner filter Remove and clean Spark plug dirty wrong...

Page 11: ...iltration on pump inlet plumbing Inlet water temperature too high Check water temperature may not exceed 70_ C 160_ F Over pressurizing pump Do not modify any factory set adjustments See Equipment Mis...

Page 12: ...TE You might have to tap the manifold lightly with a soft mallet to loosen it CAUTION Keep the manifold properly aligned with the ce ramic plungers when removing to avoid damage to the plunger or seal...

Page 13: ...ings only the other includes the packings rings and retainers See Pump Repair Kits on page 20 1 Remove the manifold as outlined in Pumping Section on page 12 2 Carefully pull the packing retainer from...

Page 14: ...You might have to tap the manifold lightly with a soft mallet to loosen CAUTION Keep the manifold properly aligned with the ce ramic plungers when removing to avoid damage to the plunger or seals 3 Ca...

Page 15: ...e is packings only the other includes the packings rings and retainers See Pump Repair Kits on page 20 1 Remove the manifold as outlined in Pumping Section on page 14 2 Carefully pull the packing reta...

Page 16: ...1 30 2 25 24 23 3 Ref 18 19 17 1 Apply sealant to threads 3 All parts supplied with unloader 10 28 29 43 39 47 See Detail 1 48 1 1 2 Supplied with pump 2 39 3 49 1 51 50 4 Shaft key supplied with engi...

Page 17: ...15_ yellow 1 805545 TIP spray Q type 2504 25_ green 1 805546 TIP spray Q type 4004 40_ white 1 19 805634 TIP spray chemical injector black 1 23 114801 HOOK pail 1 24 112380 SCREW mach fil hd 1 2 in 2...

Page 18: ...31 30 2 1 25 24 23 3 Ref 18 19 17 1 Apply sealant to threads 2 50 48 1 2 All parts supplied with unloader 3 Supplied with pump 3 27 10 28 29 40 39 9261A 49 1 47 See Detail 1 52 51 43 41 54 18 309016 P...

Page 19: ...TIP spray Q type 25_ green 805545 Model 804596 2504 1 805549 Model 804597 25045 1 TIP spray Q type 40_ white 805546 Model 804596 4004 1 805550 Model 804597 40045 1 19 805634 TIP spray chemical inject...

Page 20: ...472 Valve assembly 804402 Valve assembly 804402 Valve assembly O ring Valve seat Valve Spring Valve cage 6 6 6 6 6 804034 Valve cap 804403 Valve cap 804403 Valve cap O ring Cap 6 6 804036 Packing asse...

Page 21: ...kg 151 lb 69 kg 151 lb Dimensions Length Width Height 927 mm 36 5 in 533 mm 22 in 788 mm 31 5 in 927 mm 36 5 in 533 mm 22 in 813 mm 32 5 in 927 mm 36 5 in 533 mm 22 in 813 mm 32 5 in Maximum inlet wat...

Page 22: ...but not limited to incidental or consequential damages for lost profits lost sales injury to person or property or any other incidental or consequential loss shall be available Any action for breach...

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