76 F2B ENGINE T RAKKER E URO 4/5 540613 REPLACING INJECTOR HOLDERS Base q November 2006 Print 603.93.641 eplacing of valve guides emove valve guides by means of tool 99360288. nstall by means of tool 99360288 equipped with part 9360294, which determines the exact installation position f valve guides into the cylinder he ads; if they are not vailable, install the valve guides in the cylinder head so that hey project out by mm 16.3 to 16.7 (Figure 114). fter installing the valve guides, smooth their holes with leeker 99390310. eplacing - Reaming the valve seats o replace the valve seats, remove them using the ppropriate tool.
Figure 116 (Demonstration) 41032 eamthe valveseats (2)on cylinder head using a suitabletool 1). OTE Valve seats must be reamed whenever valves or valve guides are replaced or ground. fter reaming the valve seats, use tool 99370415, to make ure that the valve position, with respect to the cylinder head urface, is the following: - -0.5 to -0.8 mm (recessing) of exhaust valves; - -1.6 to 1.9 mm (recessing) of discharge valves. Removal Figure 117 A 1 2 45634 To replace the injector holder (2), act as follows: - thread the holder (2) with tool 99390804 (1). Carry out operations described in f igs. 118-121-122-123 - 124 by fixing tools to the cylinder head bymeans ofbraket A.