Engine Adapter

Portable Pressure Washer Familiarization and Troubleshooting Guide Section 7 • Large Frame Pump

Part 4 - Reassembly

Refer to the Torque Specifications provided on the pump sectional view found at the beginning of this section when reassembling this product.

Engine Adapter Units with Tapered Engine Shaft: 1. Units with a tapered engine shaft may have an engine adapter sleeve. Referring to Figure7.28, apply LOCTITE

Permabond No. HM160 to the outside of the larger diameter of the sleeve, then install the sleeve into the engine adapter as follows:

Figure 7.28 — Engine Adapter Sleeve Figure 7.29 — Engine Adapter Attachment (Units with Tapered Engine Shaft)

Item Name 1 Apply Loctite around the larger circumference of the ring in this area.

a. From the inside of the engine adapter, press the smaller-diameter end of the adapter sleeve into the large bore of the engine adapter. b. Tap the adapter sleeve into the engine adapter bore until it seats flush against the inside machined surface of the engine adapter. 2. Position the engine with engine shaft facing up. Referring to Figure 7.29: a. Use a new adapter gasket and install the engine adapter onto the engine. Item Name 1 Engine adapter gasket 2 Engine adapter 3 Engine adapter bearing assembly 4 Engine shaft adapter 5 Axial cam 6 Axial cam bearing assembly 7 Belleville washer 8 Jam nut 9 Socket head cap screw 10 Lock washer

b. Orient the “TOP” mark in engine adapter with top of engine and fasten the engine adapter to the engine with four (4) 5/16”-24 socket head cap screws and four (4) M8 ribbed lock washers. c. Tighten the cap screws to the torque value specified in the Torque Chart, found on Figure 7.2 (Exploded

View) at the beginning of this chapter.

NOTE: When installing the engine adapter having the glued-in sleeve, be sure to use the correct socket head cap screws. Pump assemblies used on engines with straight (non-tapered) shafts use 5/16”-24 x 3/4” long cap screws. Pumps on engines with tapered shafts use 5/16”-24 x 1” long cap screws. 3. Install the engine shaft adapter over the tapered engine shaft, as shown in Figure7.29.

Portable Pressure Washer Familiarization and Troubleshooting Guide Section 7 • Large Frame Pump

4. Install the engine adapter bearing race, followed by the engine adapter bearing and the inner cam bearing race.

Refer to Figure7.30.

Figure 7.30 — Bearing Race Assembly

Item Name 1 Engine adapter bearing race 2 Engine adapter bearing 3 Inner cam bearing race 4 Axial cam assembly 5 Outer cam bearing race 6 Axial cam bearing 7 Piston shoe bearing race

A Larger inside diameter

B Smaller inside diameter

C Chamfer faces this way Note: Inset at lower left shows bearing race cross-section and locations of chamfers

a. For ROLLER BEARINGS, the chamfered edge of the bearing races must face AWAY FROM THE BEARING

ROLLERS. That is, the flat (unchamfered) side of the race must ride against the rollers. b. For BALL BEARINGS, the bearing races are grooved to accept the bearing balls. MAKE SURE THE

BEARING BALLS ARE RIDING IN THE BEARING

RACE GROOVES. 5. Install the axial cam (with cam surface facing you) over the engine shaft adapter. Push the cam toward the engine until it seats against the engine adapter bearing race. 6. Again referring to Figure 7.30. install the outer cam bearing race, axial cam bearing and piston shoe bearing race. a. For ROLLER BEARINGS, the chamfered edge of the bearing races must face AWAY FROM THE BEARING

ROLLERS. That is, the flat (unchamfered) side of the race must ride against the rollers.

The inside diameter of the outer cam bearing race is larger than the piston shoe bearing race. b. For BALL BEARINGS, the bearing races are grooved to accept the bearing balls. MAKE SURE THE

BEARING BALLS ARE RIDING IN THE BEARING

RACE GROOVES. 7. Install the Belleville washer and the M16-1.50 jam nut over the engine tapered shaft. Tighten the M16-1.50 jam nut to the torque value specified in the Torque Chart, found on Figure 7.2 (Exploded View) at the beginning of this chapter.

Portable Pressure Washer Familiarization and Troubleshooting Guide Section 7 • Large Frame Pump

Units with Straight Engine Shaft:

Two types of engine adapters have been produced - one that uses an engine adapter gasket and socket head cap screws, and one that uses an o-ring and button head fasteners. 1. To assemble units having an engine adapter gasket, refer to Figure 7.31:

a. Use a new adapter gasket and install the engine adapter onto the engine. b. Retain the engine adapter to the engine with four (4) 5/16”-24x 3/4” socket head cap screws and for (4) M8 ribbed lock washers. c. Tighten the cap screws to the torque value specified in the Torque Chart, found on Figure 7.2 (Exploded

View) at the beginning of this chapter.

Figure 7.31 — Axial Cam Drive Components (Units with Straight Engine Shaft) When installing the engine adapter having the gluedin sleeve, be sure to use the correct socket head cap screws. Pump assemblies used on engines with straight (non-tapered) shafts use 5/16”-24 x 3/4” long cap screws. Pumps on engines with tapered shafts use 5/16”-24 x 1” long cap screws. 2. To assemble units having an O-ring seal and button head cap screws with o-ring seals, refer to Figure 7.32:

Figure 7.32 — Axial Cam Drive Components (Units with Straight Engine Shaft and O-Ring Seal)

Item Name 1 Engine adapter gasket 2 Engine adapter 3 Engine adapter bearing assembly 4 C-ring cam retainer 5 Washer retainer 6 Thrust washer 7 Engine shaft adapter 8 Axial cam 9 Axial cam bearing assembly 10 Lock washer 11 Socket head cap screw

Item

Name 1 O-ring 2 Engine adapter 3 Engine adapter bearing assembly 4 C-ring cam retainer 5 Washer retainer 6 Thrust washer 7 Engine shaft adapter 8 Axial cam 9 Axial cam bearing assembly 10 Button head cap screw 11 O-ring

a. Use a new O-ring around the housing pilot and install the engine adapter onto the engine. b. Retain the engine adapter to the engine with four (4) 5/16”-24x 3/4” button head cap screws and four (4) o-rings. c. Tighten the cap screws to the torque value specified in the Torque Chart, found on Figure 7.2 (Exploded View) at the beginning of this chapter.