TM10-3930-660-34 16-3.  TANDEM GEAR PUMP - REPAIR (Cont’d) ASSEMBLY CAUTION Do not grip on or near any machined surfaces during   disassembly   or   assembly.   Failure   to follow this precaution will cause part damage. NOTE Wipe  all  sealing  surfaces  clean  and  dry.  Apply  film  of  clean hydraulic oil to all seals as they are installed. 1. INSTALL PARTS (36-39) IN END COVER (30). a.   Secure plate (39) with two screws (38). b.   Place end cover (30) in a vise with mounting face down. c.    If removal of two plugs (37) was necessary, apply on threads. Install them in end cover (30). Stake each plug with a punch at both ends of screwdriver slot and around edges.  Peen edge of hole 1/32 to 1/16 inch with a 1-1/2 inch steel diameter ball. d.   Apply Permatex Aviation Form-A-Gasket No.  3 sealant on lip seal (36).  With metal side of seal up, use an arbor press and a bar (1-3/4 inch diameter by 2 inch long bar), press seal (36) into end cover (30).  Press seal flush with recess.  Wipe off excess sealant. 16-15