Basic Instructions ( - A.90.A.05) - New Holland CX720 Repair Manual

Basic instructions ( - A.90.A.05)

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 jeopardise sealing efficiency.
SEALING COMPOUNDS
Apply one of the following sealing compounds on the mating surfaces marked with an X: RTV SILMATE,
RHODORSIL CAF 1 or LOCTITE PLASTIC GASKET. 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
604_34_001_06 2 4/7/2006
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