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20
Rev. 2/17
GB784
FIGURE B
FIGURE A
SHIFT PISTON CHECK:
The shift piston should be checked to ensure that the shift stroke is complete.
1. Connect the tool to a clean dry air source of 90 psi to 100 psi. (6.2-6.9 bar) Max. Remove nut.
2. Install large unthreaded end of stroke setting gage (784159) over threads on head piston until it seats on pistons shoulder, gage
point #2 must line up with front of tool as shown in figure A.
3. Depress and hold actuator assy-air (704130). The piston should shift gage in forward position exposing stroke setting gage
point #3 in front of tool head as shown in figure B.
4. If tool fails to meet the above check, it should be overhauled.