TM10-3930-660-34 16-21.PISTON PUMP - REPAIR (Cont’d) 5.   REMOVE BEARING (38) FROM SHAFT (15) IF NECESSARY. Use fabricated tool (App. C,  Fig.C-8) and an arbor press to remove bearing (38) from shaft (15). 6.   REMOVE BEARING RACE (39) FROM HOUSING (6),  IF NECESSARY. Use fabricated tool (App. C,  Fig.C-9) and an arbor press to remove bearing race (39) from housing (6).Discard bearing race (39). 7.   REMOVE RETAINING RING (40) AND SHAFT SEAL (41). a.  Remove retaining ring (40). b.  Use fabricated tool (App. C,  Fig. C-10) and arbor press to remove shaft seal (41) from housing (6). 8.   DISASSEMBLE VALVE BLOCK (3) IF NECESSARY. NOTE Do not disassemble check valve parts (42) through (44) unless there is a problem with valve operation. See INSPECTION,  steps 3 and 8. a.  If necessary,  remove seat (42), valve (43),  and spring (44) from valve block (3). b.  Remove plug (45),  O-ring (46), retaining ring (47),  and piston rod (8) from valve block (3). CAUTION Be careful not to scratch the face of the valve block during bearing race (48) removal. c.  Use fabricated tool (App. C,  Fig. C-ll) and shim stock to remove bearing race (48) from valve block (3). 16-132