Lister Petter TR1, Руководство по ремонту

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page 61
12.Check that the oil holes in the housing and bearings
align.
Intermediate Main Bearing
The grooved bearing shell must be fitted to the top
half of the bearing housing with the oil holes aligned.
Re-assemble the centre main bearing housings
around the crankshaft ensuring the socket screws are
tightened.
Ensure the 'Flywheel End' identification marks on
the housing halves are correctly located before
assembly.
Main Bearing Tool 317-50006
Figure 2.47.2 Main Bearing Tool 317-50006
Note:
This tool has been replaced by 393235; both are
described and either can be used.
Gear End Main Bearing
1. Fit the correct bearing locating ring (C) onto the
plug (A).
Four bearing rings are available for standard and
undersize bearings.
2. Insert the plug and bearing ring into the main
bearing shells until the bearing ring is located
completely in the bearing shells.
3. Fit the sleeve (B) inside the crankcase with the
locating lug on the sleeve positioned in the thrust
washer locating groove in the crankcase.
4. Push the bolt (H) through the ball bearing, if used,
and through centre of the spacer (F) with the
recessed face of the spacer nearest the bolt head.
5. Fit the bolt from inside the crankcase through
the sleeve and screw it into the plug (A).
6 Maintain a firm grip on the flange of the plug and
tighten the bolt until main bearing shells are pushed
fully into the sleeve of the tool.
Section 02
Engine Servicing and Adjustments
- crankshaft main bearings
Gear End Main Bearing Replacement
The top section of the gear end main bearing shell
has an oil groove but no locating lug. When fitting new
shells extreme care must be taken to ensure that the
oil ways in the shells and crankcase are aligned. If
not correctly aligned oil restriction or starvation may
occur.
1. Position the sleeve (B) on a flat surface with the
locating lug facing downwards.
2. Slide the two halves of the new bearing into the top
of the sleeve together, ensure the ends of the new
bearings are at 90° to the locating lug.
3. Fit the correct bearing locating ring (C) onto the
plug (A).
Four bearing rings are available for standard and
undersize bearings.
4. Fit the plug into the sleeve (B) with the bearing
ring located completely in the bearing shells.
5. Place the assembly into the crankcase with the
locating lug on the sleeve positioned in the thrust
washer locating groove in the crankcase.
6. Place the ball bearing, if used, onto the bolt (H)
followed by the spacer (F) with plain face towards
the bolt head.
7. Push the bolt into the crankcase, locating the
spacer squarely against the outside of the
crankcase and screw the bolt into the plug.
8. Tighten the bolt until the bearing shells are drawn
into position.
Flywheel End Main Bearing Removal/
Replacement
The removal and fitting of bearing shells in the main
bearing housing is carried out by the same method.
The bearing housing should be held securely in a vice
or refitted to the engine.
The oil seal assembly should first be pushed out
from the centre of the housing.
The top half of the plain bearing in the main bearing
housing has a locating tongue which must be fitted
into the groove of the sleeve to ensure the tongue
locates into its recess in the main bearing housing
when fully fitted.
Intermediate Main Bearings
The grooved bearing shell must be fitted to the top
half of the bearing housing and the oil holes must be
aligned. Re-assemble the centre main bearing
housings around the crankshaft ensuring the socket
screws are tightened.
Ensure the 'Flywheel End' identification marks on
the housing halves are correctly located before
assembly.