Basic Instructions; Shimming; Rotating Shaft Seals; Sealing Compounds - New Holland T6.140 Service Manual

Basic instructions

SHIMMING

For each adjustment operation, select adjusting shims and measure individually using a micrometer, then add up
the recorded values. Do not rely on measuring the entire shimming set, which may be incorrect, or the rated value
indicated on each shim.

ROTATING SHAFT SEALS

For correct rotating shaft seal installation, proceed as follows:
• before assembly, allow the seal to soak in the oil it will be sealing for at least thirty minutes
• thoroughly clean the shaft and check that the working surface on the shaft is not damaged
• position the sealing lip facing the fluid; with hydrodynamic lips, take into consideration the shaft rotation direction
and position the grooves so that they will deviate the fluid towards the inner side of the seal
• coat the sealing lip with a thin layer of lubricant (use oil rather than grease) and fill the gap between the sealing lip
and the dust lip on double lip seals with grease
• insert the seal in its seat and press down using a flat punch, do not tap the seal with a hammer or mallet
• whilst inserting the seal, check that it is perpendicular to the seat; once settled, make sure that it makes contact
with the thrust element, if required
• to prevent damaging the seal lip on the shaft, position a protective guard during installation operations
O-RING SEALS
Lubricate the O-RING seals before inserting them in the seats, this will prevent them from overturning and twisting,
which would jeopardize sealing efficiency.

SEALING COMPOUNDS

Only use the sealants which are recommended in this manual! Before applying the sealing compound, prepare
the surfaces as follows:
• remove any incrustations using a metal brush;
• thoroughly de-grease the surfaces using one of the following cleaning agents: trichlorethylene, petrol or a water
and soda solution.
COTTER PINS
When fitting split cotter pins, ensure that the pin notch is positioned in the direction of the force required to stress the
pin. Spiral cotter pins do not require special positioning.
INTRODUCTION
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