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Hi-Pressure Seal Models:

1. Lubricate seal chamber in manifold.

NOTE: For certain applications apply liquid gasket to
the O-Ring crevices and seal surfaces (refer to Tech
Bulletin 053).

2. Carefully square Hi-Pressure Seal into position by hand

with the grooved side down (metal back facing out).

NOTE: When alternate materials, the fit of the 
special materials may be snug and require gently driv-
ing the LPS into position with a cylinder of the same
diameter to assure a square seating and no damage to
the LPS.

3. Examine Seal Case O-Ring and replace if worn. Lubricate

new O-Ring before installing.

4. Secure Hi-Pressure Seal into position by threading Seal

Case into manifold. Tighten Seal Case with special seal
case tool. Torque per chart.

Lo-Pressure Seal - All Models:

1. Examine Lo-Pressure Seals for wear or broken springs

and replace if necessary.

2. Install Lo-Pressure Seal into each seal case with garter

spring down.

3. On 5PFR and 7PFR plunger pumps do not use Snap Ring

(refer to Tech Bulletin 054).

4. On 15PFR plunger pumps install Snap Ring into each

Seal Case.

5. Install the Seal Retainer with new Wick onto each plunger

rod with tab down and wick out.

6. Rotate Crankshaft by hand so the two outside plungers

are extended equally.

7. Lightly lubricate the Ceramic Plunger, then carefully slide

the Manifold Head over the Ceramic Plunger, supporting it
from the underside to avoid damage to the plungers or
seals. Press the Manifold Head into the Crankcase until
flush.

8. Replace two (2) Lockwashers, two (2) Socket Head

Screws for (4) Flange Nuts and torque per chart.

SERVICING THE PLUNGERS

Disassembly

1. Using an M8 allen wrench on the 5PFR pumps, a M14 hex

tool on the 7PFR pumps, or a M17 hex tool on the 15PFR
pumps, remove the two (2) Socket Head Screws, and two
(2) Lockwashers or four (4) Flanged Nuts.

2. Rotate Crankshaft by hand to start separation of Manifold

head from Crankcase.

3. Insert two flat head screwdrivers on opposite sides to further

separate Manifold Head from Crankcase or support the
underside of the Manifold Head and tap lightly with a mallet
on the backside of the Manifold Head.

CAUTION: KEEP MANIFOLD PROPERLY ALIGNED
WITH CERAMIC PLUNGERS WHEN REMOVING TO
AVOID DAMAGE TO EITHER PLUNGERS OR SEALS.

4. Remove Oil Pan and slide out Seal Retainer with Wick.

5. Using an M12 hex tool on the 5, 7 and 15PFR pumps, or

an M11 hex tool on the OEM 5, and 7PFR pumps, loosen
the Plunger Retainer about three to four turns.

6. Push the Ceramic Plunger back towards the Crankcase to

separate it from the Plunger Retainer and proceed with un-
threading the Plunger Retainer by hand.

7. Remove the Plunger Retainer, O-Ring, Back-up-Ring and

Gasket. Stud may stay on Plunger Rod or come off with
Plunger Retainers.

8. Remove the Ceramic Plunger, Keyhole Washer and 

Barrier Slinger from Plunger Rod.

Reassembly

1. Visually inspect Crankcase Oil Seals for deterioration or

leaks. Contact CAT PUMPS for assistance with replace-
ment. See SERVICING THE CRANKCASE section.

2. Examine Barrier Slingers and Keyhole Washers for dam-

age. Slide onto Plunger Rod with concave side away
from Crankcase
.

3. Examine Ceramic Plunger for scoring, scale build-up, chips

or cracks and replace as needed.

4. Slide Ceramic Plunger over each Plunger Rod.

NOTE: Ceramic Plunger can only be installed in one 
direction (front to back). Do not force onto rod.

5. Examine O-Ring and Back-up-Ring on Plunger Retainer

and replace if cut or worn. Lubricate O-Rings for ease of
installation and to avoid damage to the O-Rings.

Ceramic Plunger and Retainer Arrangement

Proper Alignment of Ceramic Plungers for reassembly

Содержание 340

Страница 1: ...ure regulating devices and also for proper sizing of the nozzle or restricting orifice The pump is rated for a maximum pressure this is the pressure that is read at the discharge manifold of the pump NOT AT THE GUN OR NOZZLE Use PTFE thread tape or pipe thread sealant sparingly connect accessories or plumbing Exercise caution not to wrap tape beyond the last thread to avoid tape from becoming lodg...

Страница 2: ...al wear or breaks in the structure and replace as needed 2 Examine Springs for fatigue or breaks and replace as needed 3 Examine Valves and Seats for grooves pitting or wear and replace as needed 4 Examine Seat and Valve Plug O Rings for cuts or wear and replace as needed Lubricate and install new O Ring onto outside diameter of Seat and Valve Plugs NOTE Inlet and discharge valve parts are interch...

Страница 3: ... Models The Female Adapter V Packings and Male Adapter are easily removed from manifold without any tools If extremely worn a reverse pliers may be used Reassembly V Packing Models 1 Lubricate seal chamber in the manifold NOTE For certain applications apply liquid gasket to the O Ring crevices and seal surfaces refer to Tech Bulletin 053 2 Insert Male Adapter with notches down and v side up and pr...

Страница 4: ...17 hex tool on the 15PFR pumps remove the two 2 Socket Head Screws and two 2 Lockwashers or four 4 Flanged Nuts 2 Rotate Crankshaft by hand to start separation of Manifold head from Crankcase 3 Insert two flat head screwdrivers on opposite sides to further separate Manifold Head from Crankcase or support the underside of the Manifold Head and tap lightly with a mallet on the backside of the Manifo...

Страница 5: ...n and Manifold Port 310 317 323 530 550 035 Servicing Crankcase Section 7PFR 60PFR 036 Cylinder and Plunger Reference Chart All Models 043 LPS and HPS Servicing All Plunger Models 045 One Piece S S Plunger Retainer w Stud 5PFR 7PFR 15PFR 046 Valve Plug with Coil Spring 317 347 357 1057 047 Blind Bearing Shaft Cover Gearbox Plunger Pumps 048 Extended Valve Plug 7PFR and 15PFR 049 Stainless Steel Ha...

Страница 6: ...T with negative inlet pressure A stand pipe can be used in some applications to help maintain a positive head at the pump inlet Inspect and clean inlet filters on a regular schedule to avoid flow restriction A pressure transducer is necessary to accurately read inlet pressure Short term intermittent cavitation will not register on a standard gauge All accessories should be sized to avoid restricti...

Страница 7: ...34 10 4 6 220 52 16 7 1 8 300 80 25 10 2 10 450 120 38 14 3 15 900 250 80 30 7 20 1600 400 121 50 12 25 650 200 76 19 30 250 96 24 40 410 162 42 50 600 235 62 60 370 93 At a fixed flow rate with a given size hose the pressure drop across a given hose length will be directly proportional A 50 ft hose will exhibit one half the pressure drop of a 100 ft hose Above values shown are valid at all pressu...

Страница 8: ...e If low recharge or install a new dampener Foreign material trapped in inlet discharge valves Clean inlet discharge valves or install new valve kit Water leak Under the manifold Worn V Packings Hi Pressure or Lo Pressure Seals Install new seal kit Increase frequency of service Worn adapter o rings Install new o rings Into the crankcase Humid air condensing into water inside the crankcase Install ...

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