Maintenance
2790−1/A1
Winterthur Gas & Diesel Ltd.
1/ 7
Pilot Injection Valve: Removal, Disassemble, Check,
Assemble, Installation
Tools:
1 Torque spanner 94012 1 OBEL test bench 94272
1 Slugging wrench 94269A−55 1 Connecting piece 94272F
1 Socket wrench extension 94269C−55 1 Valve holder 94273
1 Hydraulic cylinder 94269B 1 HP hose 94275
1 Supporting plate 94270E 1 Cable 94275A
2 Stud bolts 94270F 1 Assembly tool 94289E
1. General 1..........................................................
1. General 1..........................................................
2. Preparation 2.......................................................
3. Removal 2.........................................................
4. Coupling Nut − Remove 3...........................................
5. Pilot Injection Valve − Check 4.......................................
6. Results 5..........................................................
7. Holder 5...........................................................
8. Coupling Nut − Install 6.............................................
9. Injection Valve Seal − Install 7.......................................
10. Installation 7.......................................................
1. General
WARNING
Danger: Do not weld or grind materials in the area. The sparks
from welding equipment and grinding tools can cause a fire.
Usually, it is not necessary to do maintenance of the pilot injection valve. For the
intervals to do checks or to replace parts of the pilot injection valve, refer to 0380−1
Pilot injection valve.
You must use the test bench 94272 and calibration fluid for the tasks that follow:
D To do the checks
D To disassemble
D To assemble.
You must read the instructions of the test bench manufacturer before you use it.
At random intervals, do a check of the pressure gauges of the test bench with a
master pressure gauge. Adjust the the pressure as necessary.
Note: Only trained personnel are permitted to do the test procedure.
The properties of the calibration fluid (e.g. Shell Calibration Fluid S.9365, Univar
Calibration Fluid 1487) are as follows:
D The density at 15° C is 827 kg/m3 (ISO 12185)
D The kinematic viscosity at 40° C is 2.6 mm2/s (ASTM D445)
D The pour point is −27° C (ISO 3016).
If calibration fluid is not available, you can use clean diesel oil (gas oil). If clean diesel
oil (gas oil) is used, install the injection valve immediately after you complete the
checks.
Note: It is not recommended that diesel oil (gas oil) is used if the injection valve
is put into storage after these checks. The injection valve can get
corrosion.
Pilot Injection Valve
2018−02
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