Idex Hale Sam, Technical Manual

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130
G. At bottom of valve stack, remove cover (with fitting in place).
Figure 100. PF Valve R&R
H. Remove top and bottom O-rings. (The top O-ring may be on the blank plate or on
the top valve; the other O-ring may be on the cover or on the bottom valve; see
Figure 100.)
I. Separate failed PF valve from stack.
Installation
A.
Apply O-ring lubricant to four [4] new O-rings. See Table 6 (page 44).
B. Install a new O-ring on each side of new PF valve. (Discard existing O-rings.)
C. Align new PF valve with rest of stack.
D. At top of stack, install a new O-ring on PF valve. See Figure 100.
E. Align blank plate to top PF valve.
F. At bottom of stack, install a new O-ring on PF valve.
G. Align cover to bottom PF valve.
H. Install four [4] bolts (one [1] flat washer on each) thru PF valve stack and four [4]
nuts (with one [1] flat and one [1] lock washer on threads of each bolt). See Fig-
ure 98.
I. Using two [2] 7/16-in wrenches, tighten bolts and nuts.
J. Align PF vale stack to bracket.
K. Using needle nose plyers, install all PF valve mounting spacers and hand start
mounting screws. See Figure 99.
L. Using 7-16-in wrench, tighten mounting screws.
M. Install all 4-way air valves removed for access to PF valve mounting screws.
See paragraph 4.11.2, 4-Way Air Valve R&R (page 123) and Figure 97.