The Valve Seats - Lister Petter TS1 Workshop Manual

Valve Guides - TX
After the outside of the valve guides have been coated with
Wellseal they are pressed into the cylinder head.
The projection of the valve guide above the top plate surface
must be 12.45-12.95mm (0.489-0.509in).
After fitting the internal measurement should be 7.910-
7.965mm (0.311-0.313in).
Removing Valve Guides
1. Remove the cylinder head.
2. Remove the valves.
3. Remove the valve guide oil seal.
4. Preferably place the cylinder head on its side in a soft jawed
vice.
5. Screw the correct mandrel (B) into the tool (D).
6. Place the sleeve (C) onto the tool.
7. Fit the bevelled adapter (E) into the sleeve (C) and locate the
bevel into the valve seat; it may be necessary to fit the spacer
(F) into the sleeve.
8. Locate the mandrel through the guide.
9. Screw the small threaded sleeve (A) onto the mandrel.
10. Holding the sliding handle firmly to prevent rotation,
turn the double handled lever clockwise until the guide is
T SERIES ENGINES WORKSHOP MANUAL
withdrawn through the head.
If it is found difficult to start moving the guides a sharp tap
with a copper hammer should break the seal.
Figure 2.16.1 Valve Guide Tool
Figure 2.16.2 Valve Guide Tool
Valve Guides - TS/TR
Refitting Valve Guides
The guides are marked 'IN TOP' and 'EX TOP'
1. Fit the correct mandrel into the valve guide hole from the
(inlet or exhaust valve guide, top position) and are
valve rocker end.
a press fit into the two halves of the cylinder head
2. Place the valve guide over the mandrel in the top plate.
assembly. A rubber ring and a retaining plate are
3. Place the correct depth stop (G) over the mandrel and screw
located around the top of the inlet guide on early
on the threaded sleeve (A).
engines; later engines have sealing caps on both
4. Fit the tool complete with the bevelled adapter (E) onto the
valves.
mandrel.
The rubber sealing ring must be inserted in the
5. Hold the sliding handle firmly, to prevent it rotating, and
o t p p a l e t e r c e s s b e o f e r
turn the double handled lever clockwise until the depth stop
guide to prevent damage to the ring as there is no
prevents any further movement.
lead-chamfer to the recess.
At this point the guide will protrude the correct distance
After coating the outside of the valve guides with
above the cylinder head.
Wellseal they should be pressed into their correct
6. Fit a new valve guide oil seal.
positions with the markings uppermost and pointing
towards the opposite guide. The projections of the
valve guides above the top plate surface are:
Exhaust: 17.40-17.90mm (0.685-0.704in).
Inlet: 12.40-1 2.90mm (0.488-0.507in).
These projections will be correct if the Service Tool
p e r s s n i g n i h t e l n i t e v a v l
TS, TR, TX engines workshop manual
pressing in the inserts, at ambient temperature the

2.17 The Valve Seats

head should be heated to 100°-150°C (212°-302°F)
for a minimum of 45 minutes and the insert chilled
The valve seats are cast iron inserts which are pressed into
to -65° to -75°C (-85° to -103°F) for a minimum of
position to ensure they bed on the bottom of the recess in
30 minutes.
the cylinder head. Before pressing in the inserts, at ambient
The width of the TS/TR seatings must be:
temperature the head should be heated to 100°-150°C (212°-
Inlet: 1.65-2.29mm (0.065-0.090in).
302°F) for a minimum of 45 minutes and the insert chilled to
Exhaust: 1.35-1.78mm (0.053-0.070in).
-65° to -75°C (-85° to -103°F) for a minimum of 30 minutes.
If necessary metal must be ground or cut from the
The width of the TS/TR seatings must be:
top of the insert or recess. The valves are pre- Inlet: 1.65-2.29mm (0.065-0.090in).
finished and no lapping or further processing is Exhaust: 1.35-1.78mm (0.053-0.070in).
If necessary metal must be ground or cut from the top of the
required.
insert or recess. The valves are pre-finished and no lapping or
All seats are precision ground to allow the valves to
further processing is required.
lay below the combustion surface of the head.
All seats are precision ground to allow the valves to lay below
Up to the TS/TR serial numbers shown the
the combustion surface of the head.
measurements were:
Up to the TS/TR serial numbers shown the measurements
Inlet valves: 1.02-1.27mm (0.040-0.050in).
were:
Exhaust valves: 0.89-1.14mm (0.035-0.045in).
Inlet valves: 1.02-1.27mm (0.040-0.050in).
36 00199 TS1
Exhaust valves: 0.89-1.14mm (0.035-0.045in).
36 00480 TS2
36 00199 TS1 36 00025 TR1
36 00307 TS3
36 00480 TS2 36 00020 TR2
On later TS/TR engines the measurements are:
36 00307 TS3 36 00043 TR3
Inlet valves: 0.63-0.94mm (0.025-0.037in).
On later TS/TR engines the measurements are:
Exhaust valves: 0.51-0.82mm (0.020-0.032in).
Inlet valves: 0.63-0.94mm (0.025-0.037in).
On TX engines the measurement for both valves is
Exhaust valves: 0.51-0.82mm (0.020-0.032in).
1.020-1.550mm (0.040-0.061in).
On TX engines the measurement for both valves is 1.020-
1.550mm (0.040-0.061in).
Removing Valve Guides
Valve Recess and Seat Cutting
1.Remove the cylinder head. Valve Recess and Seat Cutting
1.Fit the correct adjustable mandrel (A) into the
2.Remove the valves.
valve guide and turn the adjuster until the flutes
1. Fit the correct adjustable mandrel (A) into the valve guide and
3.Remove the valve guide oil seal.
just bind onto the guide.
turn the adjuster until the flutes just bind onto the guide.
4.Preferably place the cylinder head on its side in
2.Select the necessary cutting tool (B) and
2. Select the necessary cutting tool (B) and assemble it to the
a soft jawed vice.
assemble it to the handle (C).
handle (C).
5.Screw the correct mandrel (B) into the tool (D).
6.Place the sleeve (C) onto the tool.
7.Fit the bevelled adapter (E) into the sleeve (C)
and locate the bevel into the valve seat; it may be
necessary to fit the spacer (F) into the sleeve.
8.Locate the mandrel through the guide.
9.Screw the small threaded sleeve (A) onto the
mandrel.
10.Holding the sliding handle firmly to prevent
rotation, turn the double handled lever clockwise
until the guide is withdrawn through the head.
If it is found difficult to start moving the guides a
sharp tap with a copper hammer should break
Figure 2.17.1 Recess and Seat Cutting Tool
the seal. Figure 2.17.1 Recess and Seat Cutting Tool
3.Place the cutter over the mandrel and adjust the
3. Place the cutter over the mandrel and adjust the three
three individual blades by using the Allen Key (E).
individual blades by using the Allen Key (E).
4.Rotate the tool in a clockwise direction until the
e 4. Rotate the tool in a clockwise direction until the valve seat
valve seat or recess finish is satisfactory.
or recess finish is satisfactory.
Figure 2.16.2 Valve Guide Tool
36 00025 TR1
36 00020 TR2
36 00043 TR3
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