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5.7 Removing Bleeder Valve and Check Valve Assembly

a. Unscrew bleeder valve (51)

b. Unscrew bleed plug (50) and remove O-ring packing

(27).

c. Remove valve spacer (29) check valve spring (14)

and check valve (44).

d. Remove O-ring (15) from check valve (44).

5.8 Removing High Pressure Check Valve

a. Unscrew plug (28) and remove O-ring packing (27).

b. Unscrew adjusting screw (26).

c. Remove guide rod (13), check valve spring (14), and

check valve (44).

d. Remove O-ring packing (15) from check valve (44).

5.9 Removing Release Valve

a. Remove release valve assembly (37) and O-ring

packing (27)

b. Disassemble valve assembly by rotating handle

counter-clockwise until valve stem is free from valve

body.

c. Remove O-ring packing from valve stem.

d. Remove screw (38) and seal (39) by turning counter-

clockwise.

e. Remove O-ring packing (40).

5.10 Removing Displacement Valve

a. Remove displacement valve assembly (41).

b. Remove O-ring packing (27).

c. Remove handle from stem by rotating handle counter-

clockwise. This is not required for normal cleaning.

d. Rotate the stem clockwise (using screwdriver in the

slot at the top of the stem) until it is free from body.

e. Remove nut back-up washers and ring packing from

stem.

5.11 Stem Body from Drip Pan

a. Take out three bolts (25). This is not required for

normal cleaning.

b. Remove body assembly (2) from drip pan (3). This is

not required for normal cleaning.

5.12 Inspection

Visually inspect these parts for wear, damage, chips,

cracks and stripped threads:

Body Assembly Threads

Piston

Piston Sleeve (6)

Displacement Stem and Mating Surface in Body

Back-up Washers

Moving O-ring Packings

Dead Weights

Piston and Cylinder Assembly – 1305D

Test Gauges – 1327D

Back-up washers must fit snugly into piston sleeve and

into displacement valve body. Then check static (non-mov-

ing) packing for pinch marks, tearing or extrusion. Check

all valve seats for scratches and roughness.

Replace all worn or damaged parts. Replace all O-ring

packings at each overhaul. Coat O-ring packings with

suitable lubricant before replacing, to prevent sticking and

tearing during assembly and tightening of connections.

5.13 Reassembly

When reassembling, use where possible the wrenches

supplied with the equipment. These wrenches permit

enough leverage to seal all connections. Excessive tight-

ening of parts with tools other than those supplied may

cause distortion and eventual failure of threaded portions

of the tester body assembly casting. When replacing

O-ring packings, coat them with suitable lubricant to pre-

vent sticking and tearing during assembly and tightening

of connection.

5.14 To Reassemble

Body assembly on drip pans.

Replace body assembly (2) on drip pan (3) using bolts

(25).

5.15 Replacing Displacement Valve

a. Place O-ring packing between back-up washers.

b. Attach back-up washers and O-ring packing to dis

placement valve stem with nut.

c. Thread stem into body from the bottom – use screw

driver in the slot at top of stem.

d. Screw stem through body until the back-up washers,

and O-ring packing are fully enclosed in the body.

CAUTION: Do not damage O-ring packing when

threading stem through body.

e. Screw handle onto stem.

f. Replace displacement valve assembly (41) with

O-ring packing (27) in body assembly (2).

5.16 Replacing Release Valve

a. Place O-ring packing (40) in body casting (2) hole.

b. Insert seat (39) into body casting hole.

c. Thread & tighten screw (38) into body casting hole.

CAUTION: Be sure that stem of seat (39) fits into

screw hole.

d. Place O-ring packing on valve stem.

e. Screw handle onto valve stem.

f. Screw valve stem into body until end of stem does not

extend beyond valve body.

CAUTION: Do not damage O-ring packing when

threading valve stem through valve body.

g. Replace O-ring packing (27).

h. Replace release valve assembly (37) in body

assembly (2).

5.17 Replacing High Pressure Check Valve

a. Place O-ring packing (15) on check valve (44).

b. Slide check valve (44), check valve spring (14), and

guide rod (13) into body assembly (2).

c. Replace adjusting screw (26) and screw it in until it

stops.

d. Then turn (26) back two complete revolutions.

e. Replace plug (28) with O-ring packing (27) in body

assembly (2).

5.18 Replacing Bleeder Valve and Check

Valve Assembly

a. Replace O-ring packing (15) on check valve (44).

b. Slide check valve (44), check valve spring (14) and

valve space (29) into body assembly (2).

c. Replace bleed plug (50) with O-ring packing (27) into

body assembly (2).

5.19 Replacing Shuttle Valve, Shuttle Valve Plug and

Check Valve

a. Insert shuttle valve piston (3) into body (2).

b. Slide shuttle pin (31) into 1/8 inch (3mm) diameter

opening adjacent to fill tube (23) port. Apply slight

inserting pressure to shuttle pin (31) with plastic shaft

and operating shuttle valve (30) to insure proper

pin engagement.

c. Replace spring (32) directly behind shuttle pin (31)

and secure with set screw (33). Set screw must be

recessed by .050 inch (12mm) minimum.

d. Replace O-ring packing (15) on check valve (44).

e. Slide check valve (44) and check valve spring (14)

into body assembly (2).

5.20 Replacing Reservoir and Fill Tube

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