Kohler KD 625/2 - Injection Pump for Epa Engines; Plunger and Barrel Assembly; How to Check Plunger and Barrel for Internal Leakage

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KD 625-2 Workshop Manual_cod. ED0053029380_1° ed_ rev. 00
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Fuel system
Injection pump for EPA engines
Components:
1
Holder-delivery valve
2 Locking nut clamp
3 Screw
4 Valve-Spring
5 O Ring
6 Copper gasket
7 Plunger and barrel assembly
8 Pin spring
9 Rack
10 Seat spring
11 Spring tappet
12 Seat phasing
13 Ring snap
14 Tappet assembly roller
15 Pin tappet driver
16 Pump housing
17 Metering sleeve
18 Pin barrel locating
19 Copper gasket
20 Gasket bre seal
21 Threaded cap
22 Delivery valve assembly
How to check plunger and barrel for internal leakage
This operation is only indicative since pressure changes depending on
the pumping speed.
Connect the delivery union with a 600 bar pressure gauge with safety
valve.
Adjust rack rod at half-stroke.
Turn ywheel according to its direction of rotation so that the plunger
puts the circuit under pressure.
Replace plunger if the displayed pressure is below 300 bar.
Repeat the same operation for the other plunger.
Plunger and Barrel Assembly
1 Barrel
2 Fuel feeding port
3 Control helix
4 Plunger
5 Retardation notch
Plunger diameter is 7.5 mm.
Important
Every plunger matches with its own barrel. For this reason they are not
interchangeable.