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ASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. Lightly lubricate glyde ring assembly (3) and install
the 'B1' actuator plunger (2) into the 'B1' circuit. Be
careful not to damage or cut the glyde ring during
installation. Observe glyde ring assembly (3) through
tank port 'T' as actuator plunger (2) is being installed.
Note: It may be necessary to work the glyde rings
past the sharp edge in valve body (20) to prevent
damage to the seal. Make sure actuator plunger (2) is
completely seated and bottomed. See Fig. 8.
2. Repeat step 1 for the 'B2' actuator plunger.
Note: Start with either side (circuit) of the valve and
build that side up complete before starting on the other
circuit. Be careful to assemble components into the
circuit from which they were removed.
3. Install plunger return spring (4), regulator springs
(5 & 6) and spring seat (7) into the appropriate circuit.
If spring seat (7) does not seat correctly on top of
regulator spring (6), lightly shake valve body (20) to
correctly position spring seat (7).
4. Lightly lubricate regulator spool (8) assembly and
install into regulator sleeve (14). The spherical end of
regulator spool (8) should be at the top of regulator
sleeve (14). The top of regulator sleeve (14) is the end
with the smallest OD.
Note: Check to ensure that regulator spool (8) will
slide smoothly and freely in regulator sleeve (14).
Replace the entire spool and sleeve assembly if the
spool does not slide smoothly and freely.
5. Remove regulator spool (8) from regulator sleeve
(14) before installing sleeve into valve body (20).
6. Lightly lubricate 'O' rings (10, 12 & 13) on regulator
sleeve (14).
7. Install regulator sleeve (14) assembly into the
correct circuit of valve body (20). Make sure spring
seat (7) is correctly seated in regulator spring (6)
before installing regulator sleeve (14). Push regulator
sleeve (14) into bore until retaining flange at the base
contacts valve body (20).
8. Install spool return spring (15) into regulator spool (8).
Install reaction plunger (16) into regulator spool (8).
Reinstall regulator spool (8) into regulator sleeve (14).
SM 1225 Rev 1 9-99
Braking System - Treadle Valve
Fig. 8 - Installation of Glyde Ring Assembly
9. Repeat steps 3 through 8 for the second circuit.
10. Lightly lubricate 'O' ring (25) and install into the
counter bore in the bottom end of valve body (20).
11. Install retaining plug (26) into the counter bore on
the bottom of valve body (20). Make sure steps on
retaining plug (26) are facing the counter bore (toward
the top of valve body (20)).
12. Install base plate (27) on top of retaining plug (26)
and secure with capscrews (29) and washers (28).
Tighten capscrews (29) evenly to a torque of
16 - 17 Nm (140 - 150 lbf in), alternating diagonally to
evenly seat regulator sleeve (14) assembly.
13. Install actuator base (46) on top of valve body (20)
and secure with capscrews (45). Make sure to position
properly for correct port direction. Tighten capscrews
(45) to a torque of 20 - 21 Nm (180 - 190 lbf in).
14. Screw adjustment collars (1) onto the top of
actuator plungers (2). Screw all the way down until
they bottom on the threads.
Note: It is extremely important to bottom-out
adjustment collars (1) to prevent over-stressing and
breaking the springs during the adjustment process.
15. Lightly lubricate and install new 'O' ring (22) and
face seals (23) in grooves of plate (21).
16. Install valve body (20) in a vice with tank port 'T'
facing down. Carefully place plate (21) assembly on
valve body (20) and secure with capscrews (53).
Tighten capscrews (53) to a torque of 16 - 17 Nm
(140 - 150 lbf in).
Section 250-0070
SM - 1237
GLYDE RING
ASSEMBLY
AVOID
SHARP
EDGE
7
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