Inspect Pump Plunger, Spill Ring And Distributive Head; Inspect Plunger Springs For Squareness; Inspect Spring Length - Toyota 1PZ Repair Manual

FUEL SYSTEM - Injection Pump
2. INSPECT PUMP PLUNGER, SPILL RING AND
DISTRIBUTIVE HEAD
(a) Tilt the spill ring (distributive head) slightly and pull
out the plunger.
(b) When released, the plunger should sink down
smoothly into the spill ring (distributive head) by its
own weight.
(c) Rotate the plunger and repeat the test at various
positions.
If the plunger sticks at any position, replace the parts as a
set.
(d) Insert the governor link ball pin into the spill ring and
check that it moves smoothly without any play.
3.

INSPECT PLUNGER SPRINGS FOR SQUARENESS

Using a steel square, check the squareness of the plunger
springs.
Maximum squareness: 2.0 mm (0.079 in.)
If squareness is greater than maximum, replace the springs.
4.

INSPECT SPRING LENGTH

Using vernier calipers, measure the free length of each
spring.
Spring free length:
Delivery valve spring
1 HD-T
Plunger spring
Coupling spring
Pneumatic bellows spring (w/ HAC)
Boost compensator spring
If the free length is not as specified, replace the spring(s).
1 PZ and 1 HZ
1PZand1HZ
1HD-T
1 PZ and 1 HZ
1HD-T
1PZand1HZ(w/ HAC)
1HD-T (Europe)
1 HD-T (Others w/o BACS)
1 HD-T (Others w/ BACS)
FU-47
24.4 mm (0.961 in.)
19.1 mm (0.752 in.)
30.0 mm (1.181 in.)
31.2 mm (1.228 in.)
16.6 mm (0.654 in.)
15.5 mm (0.610 in.)
35.0 mm (1.378 in.)
19.7 mm (0.776 in.)
19.6 mm (0.772 in.)
21.8 mm (0.858 in.)