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Plunger and delivery valve springs
1. Check the surface of each spring for scratches
and rust.
2. Using a square, measure the perpendicularity
(gap, B) at the upper end of the spring.
If the measurement exceeds the service limit, re-
place the spring.
Plunger Spring, mm [in.]
Free length (A)
Assembly Standard ... 70.8 [2.787]
Perpendicularity (B)
Service Limit ............. 1.8 [0.071]
Length under test force, mm [in.]
Assembly standard ... 60.0 [2.36]
Test force, N (kgf) [lbf]
Assembly standard ... 299–366 (30.5–37.3) [67.2–82.2]
Delivery valve spring, mm [in.]
Free length (A)
Assembly Standard ... 18 [0.71]
Perpendicularity (B)
Service Limit ............. 0.6 [0.024]
Length under test force, mm [in.]
Assembly standard ... 14.15 [0.56]
Test force, N (kgf) [lbf]
Assembly standard ... 51.6-61.4 (5.26–6.26) [11.60–13.80]
Valve holders
1. Check the contacting surfaces of injection pipe
and delivery valve on each valve holder for
scratches.
2. If the contact surfaces are scratched, replace the
valve holder since surface scratches can cause
fuel leakage.
Pump case
Check the pump case for surface scratches, dents,
cracks and damage. If critical flaws are found, re-
place with a new part.
O-rings and bellow
Replace O-rings, gaskets and below with new ones
once disturbed.
Group 23 Fuel System
159
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