Triumph Tigress TW2, Service Sheet

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Service Sheet No. 1004 (contd.)
Removal of the camshaft pinion will expose the oil pump link which is driven by an
eccentric on the camshaft and is retained in position by a phosphor bronze plate held by two large
countersunk screws. These screws can be removed with a normal type screwdriver, after which the
phosphor bronze plate can be taken off and the distance piece removed showing the eccentric and
linkage assembly.
To remove the link, flatten the tab washer underneath the screw head on the oil pump
plunger, take out the bolt and then slide the link out of the fork end. It can then be taken off the
camshaft together with the eccentric.
There is a Woodruff key in the end of the camshaft and if this is undamaged and a good fit it
need not be disturbed for removal of the camshaft, which can be slid out of the crankcase from
either end.
This unit uses a timed camshaft breather which is simply a hole drilled straight through the
camshaft, lining up with holes drilled through the centre camshaft bearing. The breather is
therefore open at every half revolution of the camshaft.
To remove the camshaft turn the block upside down so that the cam followers drop away
from the shaft and then slide the camshaft out. The unit can then be turned the right way up
and the cam followers dropped down into the crankcase.
Turn the unit upside down again and remove the twelve Phillips head screws retaining the
sump cover. The cover can then be taken away together with the baffle plate and the oil pump
filter, which is fitted over the oil pipe between the baffle plate and the sump cover.
The oil pipe is an interference fit into the crankcase and should not be disturbed if it is
undamaged.
Gaskets are fitted between the crankcase and the baffle plate and between the baffle plate and
the sump cover. The engine breather cover, which is to the bottom rear of the cylinder block,
can be removed together with the fibre gasket by taking out the small 3/16 in. Phillips head screw.
The only attention required in this case will be to clean it of any dirt or accumulation of sludge.
Removal of the Oil Pump
Unscrew the slotted plug which will be seen on the crankcase joint face; this has a normal
right-hand thread. With the plug removed the remaining parts of the pump can be taken out, using a
piece of thin wire bent to a hook at the end. First lift out the spring, if this has not come away
with the screw plug, then drop out the first steel ball ; next lift out the long plunger noting that the
small hole with the countersunk face is uppermost. Then another spring and another steel ball with
finally a thin washer, again having a countersunk face or ball seating which is uppermost, (i.e., next
to the ball). When these parts are removed it only leaves the plunger which is connected to the
link and the phosphor bronze plunger bush which should not be disturbed.