MAXIMATOR VP30 Maintenance Information page 10

If the valve plate assembly 6/11 is excessively worn it must be replaced.
Reassemble in reverse order, fitting new gaskets. When reassembling, lubricate every component
(except gaskets) with clean lubricating oil.
On reassembly, tighten the cylinder head screws to the correct torque loading.
3rd Stage Valves
Unscrew the tubing nut adaptors and detach cooler tubes from the cylinder head.
Unscrew and remove vavle retainer 7/15 and locking nut 7/14, together with seal 7/13.
Unscrew and remove caphead screws 7/12 and lift off cylinder head valves 7/11.
Remove valve 7/10 together with seals 7/9 and 7/8.
Carefully clean valves using soft scrapers, (eg. copper, wood, plastic) and petroleum (gasoline) to
remove carbon deposits and dirt.
Clean the cylinder face of 7/7 and clean cylinder head 7/11 thoroughly, removing all traces of
carbon buildup. Ensure that all mating surfaces are clean and smooth.
Clean the mating surface and cylinder bore of the cylinder 7/7and remove the rest of 7/7 above.
Ensure that no dust or dirt particles remain in the cylinder. Use compressed air to blow out if
necessary. If the valve 7/10 is excessively worn it must be replaced.
Seals 7/8, 7/9, 7/13 should always be replaced, to avoid premature leakage. When installing these
seals ensure that they are correctly located around the valves.
Reassemble in reverse order. When reassembling lubricate every component, (except gaskets but
including O-rings) with clean lubricating oil.
To reassemble, locate valve 7/10 into the cylinder head 7/11 with seals 7/8 and 7/9. Mate the
assembly with the cylinder 7/7. Replace the capscrews 7/12, turning 1/16
diagonal pattern. Tighten to the correct torque loading.
Replace locking nut 7/14 with seal 7/13 and tighten against the valve.
Replace lock-ring 7/15 and tighten.
Re-attach the cooler tubes.
Type of screw
M6 screw, quality 8.8
M6 screw, quality 10.9
M8 screw, quality 8.8
M8 screw, quality 10.9
M10 screw, quality 8.8
M10 screw, quality 10.9
M12 screw, quality 8.8
M12 screw, quality 10.9
M12 screw, quality 12.9
Central pressure screw conc. valve
Maximum tightening torques for cylinder head screws and connecting rod screws
July 21
MAINTENANCE INFORMATION
M
Max
10 Nm
14 Nm
24 Nm
32 Nm
50 Nm
70 Nm
88 Nm
120 Nm
130 Nm
200 Nm
VP30/VP500
th turn at a time in a
10 of 42