CLEANING -832450119

TM 10-3930-660-24-2

FUEL INJECTOR MAINTENANCE - CONTINUED

0223 00

CLEANING

WARNING

Cleaning compound, solvent MIL-PRF-680 Type III is an environmentally compliant and low toxic mate-

rial. However, it may be irritating to the eyes and skin. Use protective gloves and goggles. Use in well-ven-

tilated areas. Keep away from open flames and other sources of ignition.

Rinse nozzle with solvent (WP 0316 00).

INSPECTION

Inspect needle tip for roughness or erosion. Note that rough machined appearance is normal for pressure shoulder.

TESTING

WARNING

Keep clear of test spray from nozzle. Fluid at test pressures can penetrate skin, causing infection and possi-

ble death.

Eye protection must be worn when performing maintenance where components or particles could fly out

during procedure. Failure to take precautions could cause injury to personnel.

Some components are under spring tension. Wear eye protection and use caution when disassembling them,

to avoid injury.

Connect injector to fuel injector test set.

INJECTOR

Open valve and operate pump lever at a rate of one

stroke per second while observing test pressure gauge

FUEL INJECTOR

TEST SET

Spray must begin at a pressure of 3,553 +/- 73 psi

(2450 +/- 503 kPa).

VALVE

NOTE

If spray does not begin within pressure

range specified in step 4, change thickness

of shims. Adding shims will increase

opening pressure. Remove shims to

decrease opening pressure.

409-1054

Check for well-atomized spray pattern.

NOTE

For leakage test, use same test set up for opening pressure test.

Open valve on test set.

0223 00-3