Use and Care Manual

ManualsBrandsUnbranded ManualsOutdoor Power Equipment3500 PSI 3 GPM Triplex Plunger Pump

First Choice When Quality Matters

NORTH

AMERICA

Plunger Pumps

Operating Instructions and Parts Manual RSV Series Pumps

Disassembly:

1. First remove the eight

5mm head bolts. (See

Figure 10)

2. Place the screwdrivers

as shown between the

head and crankcase of the

pump, lifting one up

and the other down.

The head should

start to lift off of

the plungers. (See

Figure 11)

3. When you remove

the head you may notice

that some of the water

seals have stayed on the

plungers and some in

the head. To remove

the seals from the

plungers simple turn the

assemblies and pull off.

(See Figure 12)

4. If the seal assemblies

are in the head use

the channel lock

pliers to grab the

seal retainer on the

outside ring, twist

the retainer in either

direction (this is done to

free the retainer O-ring

which is stuck to the manifold) and

lift out. (See Figure

13)

5. With your ﬁ nger pull

out the white restop

ring. (See Figure 14)

6. With your ﬁ nger pull the

high-pressure seal and

head ring out of the

head. (See Figure 15)

7. The low-pressure seal

is located in the brass

seal retainer. Using

the mechanics pick, go

in between the seal and

retainer and pull the

seal toward the center

and pull outwards. (See

Figure 16)

8. Remove the seal retainer

O-ring with the

mechanics pick. (See

Figure 17)

Assembly:

1. Install the plastic head

ring into the head

(the ﬂ at side is on

the bottom). (See

Figure 18)

2. Install the high-

pressure seal. Place the

seal so the open “V” portion is

toward the head ring. You need

to place the seal at an angle and

pull and push to work the seal into

position with your

ﬁ ngers (do not use any

tools you may damage

the seal). Make sure

the seal is totally

seated against the head

ring. (See Figure 19 &

20)

3. Place the white restop

ring so it mates to the

top of the high pressure

Figure 11

Figure 12

Figure 14

Figure 13

Figure 10

Figure 16

Figure 17

Figure 15

Figure 18

Figure 20

Figure 19

Service Pumps (continued)

Plunger Pumps

Operating Instructions and Parts Manual RSV Series Pumps

First Choice When Quality Matters

NORTH

AMERICA

Symptom Possible Cause(s) Corrective Action

Low pressure (cont.) 3 Air leak in inlet plumbing 3 Disassemble, reseal and reas-

semble

4 Relief valve stuck, partially

plugged or improperly

adjusted valve seat worn

4 Clean and adjust relief valve;

check for worn or dirty valve

seats

5 Worn packing. Abrasive

in pumped in cavitation.

Inadequate water

5 Install proper ﬁ lter suction at

inlet manifold must be limited to

lifting less than 20 feet of water

or 8.5 psi vacuum

6 Worn inlet, discharge valve

blocked or dirty

6 Replace inlet and discharge valve

Pump runs extremely

rough, pressure very

low

1 Inlet restrictions and/or air

leaks.

1 Clean out foreign material

2 Stuck inlet or discharge

valve

2 Replace worn valves

Water leakage from

under manifold

Worn packing or cracked

plunger

Install new packing or plunger

Slight leak, oil leak-

ing in the area of

crankshaft

1 Worn crankshaft seal or

improperly installed oil seal

o-ring

1 Remove oil seal retainer and

replace damaged 0-ring and/or

seals

2 Bad bearing 2 Replace bearing

Excessive play in the

end of the crankshaft

pulley

Worn main bearing from

excessive tension on drive

belt

Replace crankcase bearing and/or

tension drive belt

Water in crankcase 1 Humid air condensing into

water inside the crankcase

1 Change oil intervals

2 Worn packing and/or

cracked plunger

2 Replace packing. Replace

plunger

Loud knocking noise

in pump

1 Cavitation or sucking air 1 Check water supply is turned on

2 Pulley loose on crankshaft 2 Check key and tighten set screw

3 Broken or worn bearing 3 Replace bearing

Troubleshooting (cont.)