300Tdi Discovery
19
FUEL SYSTEM
12
REPAIR
Throttle disc - inspect and overhaul
36. Examine throttle shaft for excessive wear
between bushes in plenum chamber and shaft.
A small amount of clearance is permissible. If
excessive wear is evident fit new shaft and
bushes as follows.
37. Remove two split screws securing throttle disc
and withdraw disc.
CAUTION: Take care not to damage shaft.
38. Remove shaft and air seal from plenum
chamber.
39. Using suitable drift, drive out bushes.
CAUTION: Take care not to damage
plenum chamber bores
40. Press in new bushes until flush with throttle disc
bore.
CAUTION: Ensure that bushes do not
protrude into bore, as they will interfere
with movement of throttle disc.
41. Fit throttle shaft and disc, secure with two split
screws. Do not fully tighten screws.
42. Rotate throttle shaft 360˚ once or twice to
centralise disc in bore. Tighten split screws.
43. Rotate shaft. Use screw driver to spread split.
