TD5 Defender
ENGINE
25
OVERHAUL
8. Place a straight edge across pump body and
using feeler gauges, measure end-float of outer
rotor:
Outer rotor end-float = 0.038 to 0.075 mm
(0.001 to 0.003 in)
9. Check drive shaft bush in pump cover for signs
of scoring and wear.
10. Renew oil pump and stiffener plate assembly if
excessive scoring exists or clearances exceed
limits given.
11. Lubricate pump rotors and drive shaft bush with
engine oil.
12. Fit rotors ensuring reference marks are aligned
and identification mark on inner rotor is facing
forwards.
13. Fit cover to pump, fit 5 new screws and tighten
by diagonal selection to 6 Nm (4.5 lbf.ft) .
14. Check that pump rotors rotate freely.
Oil pressure relief valve
1. Remove and discard oil pressure relief valve
plug.
2. Remove spring and relief valve plunger.
3. Clean valve plunger and spring.
4. Check valve plunger and relief valve bore for
scoring and corrosion.
NOTE: Light scoring and corrosion may be
removed using grade 600 emery cloth
soaked in oil.
5. Check spring for distortion, check free length of
spring:
Spring free length = 42.00 mm (1.65 in)
CAUTION: Renew relief valve as an
assembly.
6. Lubricate valve plunger and seating.
7. Fit valve plunger and spring to oil pump.
8. Apply Loctite 243 sealant to threads of a new
plug.
CAUTION: Do not attempt to fit original
plug.
9. Fit plug and tighten to 23 Nm (17 lbf.ft) .
