HF-7-604 Page 44
12. Gear Installation
58.
Fixed gear should be on left rotor looking from discharge port. Always install
fi
x gear
fi
rst.
59. Place
fi
xed gear (18), with screw holes facing up, on its matching rotor shaft. Place gear tool (T21) over rotor
shaft and onto gear.
60.
Screw the hydraulic bolt (T4), with nut (T5) and
fl
at washer (T6), through gear tool (T21) and into the rotor shaft.
Attach hydraulic hose (T26) and pump (T25) to the hydraulic bolt. Tighten nut (T5) against tool.
61.
Begin both tightening nut and pressurizing gear. Press gear down against shims.
62. Verify that the gear is fully seated against shim using 0.002” feeler gauge. Feeler should not go be- tween
bottom gear face and shims.
63.
Release the pressure and drain the oil for at least 1 minute. Disassemble the Injector tool.
64. Repeat
steps
59
thru
63
for
fl
oating gear.
65. Take out 0.010” shims used for timing and (T10) tools used to protect (
fi
x) rotors rotation.
66. Measure and record the interlobe clearance on both sides of each drive rotor lobe. The clearances must be
measured along the entire length of the lobes. Verify that these clearances are within the range speci
fi
ed on
the clearance table.
67.
Lock the idler rotor from turning by wedging a feeler gauge or shop rag between the tip of a lobe and the air
cylinder. Measure the backlash of the gears using a dial indicator and a magnetic base. Gear backlash is the
distance (in the circumferential direction) a gear tooth can freely move when the mating gear is
fi
xed. This should
be measured in 3 places (every 1/3 turn) and recorded. Verify that the back- lash is within the range of 0.001”-
0.0045”.
Summary of Contents for HELIFLOW 8 Series
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