FOR MODELS: JGW, JGR AND JGJ SECTION 5 - MAINTENANCE
1/01 PAGE 5 - 7
Crosshead - Installation
NOTE: BE SURE CROSSHEADS ARE RETURNED TO THEIR ORIGINAL THROW
LOCATION.
1. With the crosshead on its side, slip it in the crosshead guide. Once inside, it can
be rolled upright. Make sure it does not become cocked. Should the crosshead
become wedged, do not force it. ease it off and start again. Be careful not to
damage the crosshead shoe surface during installation.
2. Turn the crankshaft to its outer dead center position to locate the connecting rod
in position and insert the crosshead pin. Install the end plates, thru bolt and lock-
nut. Tighten the locknut to the torque value listed in Table 1-11.
3. Reinstall the crosshead nut on the piston rod. Be sure to have setscrew cup
points on the crosshead side of the nut. Screw the piston/rod assembly into the
crosshead using the Piston Nut Torquing Adaptor. Make sure all threads are
well lubricated with clean fresh oil to ensure smooth installation.
NOTE PISTON END CLEARANCE MUST NOW BE SET OR SERIOUS DAMAGE
COULD OCCUR. REFER TO Table 1-3 on page 1-9 FOR PISTON END CLEAR-
ANCE SETTINGS.
4. Tighten the crosshead nut using the special slugging Peg Wrench or Open End
Wrench shown in Figure 7-1: on page 7-3.
5. Before installing the side covers, apply an anti-seize lubricant to the gaskets.
This will aid to ease removal at a later date.
6. Replace the crosshead guide side covers; tighten all capscrews.
FIGURE 5-3: CROSSHEAD BUSHING REPLACEMENT
Approximately 3 Tons (27 kN) Force Required
Bushing
Inner
Support
Do Not Support Here
Crosshead
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