GP7122 REPAIR INSTRUCTIONS
Valve Seat identification markings
7)When reassembling: The inlet valve seat (51C) is 1mm smaller in diameter than the discharge valve seat (52C). Inlet valve seats are marked "S" and always have to be installed first. Discharge valve seats are marked "P" and are always to be installed on top of inlet valve. Plugs (58) are to be tensioned down evenly with screws (58C) and in crosswise pattern at 155 (ft.lbs.).
TO CHECK SEALS
8)Loosen nuts (49A) with a 24mm socket wrench.
11)By gripping hex flats, sepa- rate plunger (36) from cross- head (25) by means of two
9)With a rubber mallet tap the back of the valve casing (50) and pull the valve casing off the stud bolt (49).
12)Remove tension spring (40) from seal retainer (38).
10)Remove cover plate (30) with a 10mm socket wrench.
13)Pull seal sleeves (38) and plungers (36) out of their fittings in the crankcase
(1) using ring groove as a guide.
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