TS, TR, TX engines workshop manual
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T SERIES ENGINES WORKSHOP MANUAL
19
3.Fit the slide hammer tool on to adaptor.
4.Align the stub shaft with the stub shaft hole.
5.Grasp the slide hammer with one hand while
positioning the rocker arm with the other and
refit the stub shaft by striking the end of the tool
nearest the cylinder head with the slide hammer.
If the rocker lever bush is not correctly lined up
and is preventing the stub shaft being refitted
gently strike either end of the tool with the slide
hammer while repositioning the rocker arm.
Note:
Ideally, after fitting, the stub shaft hole and
internal hole of the rocker arm bush will be
perfectly aligned. Small 'G' clamps or a second
pair of hands may be required.
2.14 THE VALVE ROCKERS - TX
The removal of the valve rocker assembly is
necessary when it is required to examine or change
the valves, valve seats, rocker arms or rocker arm
bushes.
Removing an Individual Rocker Arm
Individual rocker arms can be removed without
removing the rocker assembly.
1.Remove the rocker cover.
2.With the piston at TDC on the firing stroke screw
the rocker adjusting screw (A) anti-clockwise
until the valve spring is not tensioned.
Figure 2.14.1 Valve Rocker
3.Using suitable circlip pliers remove the circlip (B)
and slide the rocker lever off the stub shaft.
4.With the piston at TDC on the firing stroke and
the adjusting screw turned fully anti-clockwise
slide the rocker lever onto the stub shaft.
5.Using suitable circlip pliers replace the circlip and
check that it is fully seated in the groove.
6.Check and reset the valve clearance.
7.Replace the valve rocker cover.
2.15 THE VALVES
Removing the Valves
1.Remove the cylinder head.
2.Remove the TS/TR valve rockers.
3.Remove the TX valve rocker assembly and oil
restrictor plate.
4.Lay the cylinder head upright on a bench and
place a circular block of wood under the head of
the valve.
5.Place the adapter (A) onto the valve spring carrier
with the two indentations facing outwards.
Figure 2.15.1 Valve Spring Compressor
6.Fit the tool (B) into the two plate indentations.
7.Push down on the tool until the collets can be
removed.
8.Gently release the tool and remove the carrier,
valve cap, valve spring and the valve stem
shields.
TS/TR1 engines are not fitted with an exhaust
valve stem shield.
9.Turn the cylinder head over and remove the
valve.
Refitting the Valves
1.Assemble the valves in the reverse order ensuring
the collets are securely in position with their tops
slightly sunk in the valve spring carrier.
2.Fit the valve stem caps
3.Replace the TS/TR valve rocker and stub shaft.
4.Replace the TX oil restrictor plate and the valve
rocker assembly.
5.Replace the cylinder head and set the valve
clearance.
6.Replace the valve rocker cover.
2.16 THE VALVE GUIDES
It is recommended that valve guides are removed
and refitted with the aid of the Service Tool to
ensure the correct protrusion is obtained.
Figure 2.14.1 Valve Rocker
3. Using suitable circlip pliers remove the circlip (B) and slide
the rocker lever off the stub shaft.
4. With the piston at TDC on the firing stroke and the adjusting
screw turned fully anti-clockwise slide the rocker lever onto
the stub shaft.
5. Using suitable circlip pliers replace the circlip and check that
it is fully seated in the groove.
6. Check and reset the valve clearance.
7. Replace the valve rocker cover.
2.15 The Valves
Removing the Valves
1. Remove the cylinder head.
2. Remove the TS/TR valve rockers.
3. Remove the TX valve rocker assembly and oil restrictor
plate.
4. Lay the cylinder head upright on a bench and place a circular
block of wood under the head of the valve.
5. Place the adapter (A) onto the valve spring carrier with the
two indentations facing outwards.
T SERIES ENGINES WORKSHOP MANUAL
19
3.Fit the slide hammer tool on to adaptor.
4.Align the stub shaft with the stub shaft hole.
5.Grasp the slide hammer with one hand while
positioning the rocker arm with the other and
refit the stub shaft by striking the end of the tool
nearest the cylinder head with the slide hammer.
If the rocker lever bush is not correctly lined up
and is preventing the stub shaft being refitted
gently strike either end of the tool with the slide
hammer while repositioning the rocker arm.
Note:
Ideally, after fitting, the stub shaft hole and
internal hole of the rocker arm bush will be
perfectly aligned. Small 'G' clamps or a second
pair of hands may be required.
2.14 THE VALVE ROCKERS - TX
The removal of the valve rocker assembly is
necessary when it is required to examine or change
the valves, valve seats, rocker arms or rocker arm
bushes.
Removing an Individual Rocker Arm
Individual rocker arms can be removed without
removing the rocker assembly.
1.Remove the rocker cover.
2.With the piston at TDC on the firing stroke screw
the rocker adjusting screw (A) anti-clockwise
until the valve spring is not tensioned.
Figure 2.14.1 Valve Rocker
3.Using suitable circlip pliers remove the circlip (B)
and slide the rocker lever off the stub shaft.
4.With the piston at TDC on the firing stroke and
the adjusting screw turned fully anti-clockwise
slide the rocker lever onto the stub shaft.
5.Using suitable circlip pliers replace the circlip and
check that it is fully seated in the groove.
6.Check and reset the valve clearance.
7.Replace the valve rocker cover.
2.15 THE VALVES
Removing the Valves
1.Remove the cylinder head.
2.Remove the TS/TR valve rockers.
3.Remove the TX valve rocker assembly and oil
restrictor plate.
4.Lay the cylinder head upright on a bench and
place a circular block of wood under the head of
the valve.
5.Place the adapter (A) onto the valve spring carrier
with the two indentations facing outwards.
Figure 2.15.1 Valve Spring Compressor
6.Fit the tool (B) into the two plate indentations.
7.Push down on the tool until the collets can be
removed.
8.Gently release the tool and remove the carrier,
valve cap, valve spring and the valve stem
shields.
TS/TR1 engines are not fitted with an exhaust
valve stem shield.
9.Turn the cylinder head over and remove the
valve.
Refitting the Valves
1.Assemble the valves in the reverse order ensuring
the collets are securely in position with their tops
slightly sunk in the valve spring carrier.
2.Fit the valve stem caps
3.Replace the TS/TR valve rocker and stub shaft.
4.Replace the TX oil restrictor plate and the valve
rocker assembly.
5.Replace the cylinder head and set the valve
clearance.
6.Replace the valve rocker cover.
2.16 THE VALVE GUIDES
It is recommended that valve guides are removed
and refitted with the aid of the Service Tool to
ensure the correct protrusion is obtained.
Figure 2.15.1 Valve Spring Compressor
6. Fit the tool (B) into the two plate indentations.
7. Push down on the tool until the collets can be removed.
8. Gently release the tool and remove the carrier, valve cap,
valve spring and the valve stem shields.
TS/TR1 engines are not fitted with an exhaust valve stem
shield.
9. Turn the cylinder head over and remove the valve.
Refitting the Valves
1. Assemble the valves in the reverse order ensuring the collets
are securely in position with their tops slightly sunk in the
valve spring carrier.
2. Fit the valve stem caps
3. Replace the TS/TR valve rocker and stub shaft.
4. Replace the TX oil restrictor plate and the valve rocker
assembly.
5. Replace the cylinder head and set the valve clearance.
6. Replace the valve rocker cover.
2.16 The Valve Guides
It is recommended that valve guides are removed and refitted
with the aid of the Service Tool to ensure the correct protrusion
is obtained.
T SERIES ENGINES WORKSHOP MANUAL
20
Figure 2.16.1 Valve Guide Tool
Valve Guides - TS/TR
The guides are marked 'IN TOP' and 'EX TOP'
(inlet or exhaust valve guide, top position) and are
a press
fit
into the two halves of the cylinder head
assembly. A rubber ring and a retaining plate are
located around the top of the inlet guide on early
engines; later engines have sealing caps on both
valves.
The rubber sealing ring must be inserted in the
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guide to prevent damage to the ring as there is no
lead-chamfer to the recess.
After coating the outside of the valve guides with
Wellseal they should be pressed into their correct
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
is used.
After assembly a gauge 8.707mm (0.343in)
diameter must pass through the exhaust valve
guide. If the gauge does not pass through, the
guide must be reamed square to 8.707-8.727mm
(0.343-0.3436in) diameter.
These measurements also apply to cylinder heads
fitted
with
pre-finished
valve guides that have been
obtained from Lister Petter Power Systems.
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 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 2.16.2 Valve Guide Tool
Refitting
Valve Guides
1.Fit the correct mandrel into the valve guide hole
from the valve rocker end.
2.Place the valve guide over the mandrel in the top
plate.
3.Place the correct depth stop (G) over the mandrel
and screw on the threaded sleeve (A).
4.Fit the tool complete with the bevelled adapter
(E) onto the mandrel.
5.Hold the sliding handle
firml
y, to prevent it rotating,
and turn the double handled lever clockwise until
the depth stop prevents any further movement.
At this point the guide will protrude the correct
distance above the cylinder head.
6.Fit a new valve guide oil seal.
2.17 THE VALVE SEATS
The valve seats are cast iron inserts which are
pressed into position to ensure they bed on the
bottom of the recess in the cylinder head. Before
Figure 2.16.1 Valve Guide Tool
Valve Guides - TS/TR
The guides are marked 'IN TOP' and 'EX TOP' (inlet or exhaust
valve guide, top position) and are a press fit into the two halves
of the cylinder head assembly. A rubber ring and a retaining
plate are located around the top of the inlet guide on early
engines; later engines have sealing caps on both valves.
The rubber sealing ring must be inserted in the top plate recess
before pressing in the inlet valve guide to prevent damage to
the ring as there is no lead-chamfer to the recess.
After coating the outside of the valve guides with Wellseal
they should be pressed into their correct 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 is used.
After assembly a gauge 8.707mm (0.343in) diameter must pass
through the exhaust valve guide. If the gauge does not pass
through, the guide must be reamed square to 8.707-8.727mm
(0.343-0.3436in) diameter.
These measurements also apply to cylinder heads fitted with
pre-finished valve guides that have been obtained from Lister
Petter Power Systems.
Summary of Contents for TS/TR1
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