F.4.5 Clean the two oval gears with kerosene and ensure the gears without
being damaged;
F.4.6 Clean the gear cavity with kerosene and make sure the kerosene
should not splash onto the crystal display area;
F.4.7 Carefully put the seal mat up to the front cover;
F.4.8 Put the two ovals gear up to the two cylinders; rotate a gear to ensure
the gear is move smoothly.
F.4.9 Carefully put it back the control valve body, then tighten the 8pcs of
hexagon screws.
F.5 maintenance
F.5.1 All the parts should be checked as per the following steps to be
disassembled, the worn or the damage shall not be used.
F.5.2 See the explosion chart to check every corresponding spare parts
numbers.
F.5.3 Disassembling
F.5.3.1 Disassembling of grease outlet
1) Remove the grease coupler from the control valve;
2) Remove the grease hose 4;
3) Discharge the outlet valve.
F.5.3.2 Disassembling of trigger
1) Rotate out of the regulating hand wheel;
2) Rotate out of the hex nut 20;
3) Rotate the two hex bolts 27;
4) Discharge the trigger 17and tapered spring 18.
F.5.3.3 Disassembling of circuit board
1) Rotate out of 4 pieces of hex bolt 27;
2) Remove the cover 2 and transparent board 8
3) Rotate out of the three screws 12 from the board; not to break the three
wire of circuit board.
F.5.4 Assembling: Do the opposite step of the disassembling.