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Operating Manual
Pump Torque Key Size
Nm (lb/ft) mm
D4 14 (10) 5
D5 35 (26) 6
D6 35 (26) 6
Timing Gears
TLA
10.0
Gearbox Components
10.1 Timing Gears
Each pump is fitted with a pair of timing gears,
which are located in the rear of the gearcase and
ensure synchronisation of the rotors, such that
under normal working conditions they will not
contact one another.
The timing gears on pumps in the D range are
retained using Torque Locking Assemblies (TLA)
similar to those used to retain the rotors. The
method of correctly tightening the TLA's is the
same as for the rotors as previously described.
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