FOR MODELS: JGW, JGR AND JGJ SECTION 5 - MAINTENANCE
1/01 PAGE 5 - 35
high pressure applications, place a new, proper, soft metallic wire gasket on the retainer and
install the valve cap. Be careful not to gouge the bore, distort or damage the wire gasket.
Always use a new metallic wire gasket; wire gaskets are not reusable.
Lubricate threads and bolt seating surfaces with petroleum type lubricant, and install bolts.
Do not use anti-seize compounds on valve cap bolting. Tighten each bolt until snug using a
criss-cross pattern. Next, tighten each bolt to 25% of full torque, moving across from bolt to
bolt, in a criss-cross pattern. See Figure 5-20: 1-2-3-4-5. Repeat this step for 50%, 75% and
100% of full torque.
Proper tightening and torquing is important for all valve caps, but is especially important for
high pressure valve cap assemblies. High pressure applications have caution plates on the
cylinder which are stamped with proper torque values:
CAUTION
SEVERE PERSONAL INJURY AND PROPERTY DAMAGE
CAN RESULT IF VALVE CAP BOLTING IS NOT INSTALLED
TO PROPER TORQUE OF ______FT. LBS. ______N·m.
REFER TO TECHNICAL MANUAL FOR PROPER TORQUING
PROCEDURE.
!
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