Maintenance
2722−1/A2
RT-flex58T-E
Winterthur Gas & Diesel Ltd.
3/ 12
3. Judging an injection valve
For correct functioning and for a reuse of an injection valve observe the following
points:
D Spray pattern: Fuel will spray mainly from the holes in the first level of the
nozzle tip at the specified opening pressure. No fuel should drip from nozzle
tip when injection is finished.
D For new injection valves the opening pressure is 460 ±5 bar.
On used injection valves a pressure reduction of 30 bar may be acceptable. If
a readjustment of the opening pressure be necessary, see section ’Adjusting
the opening pressure’.
D In order to test tightness between the nozzle needle and needle seat, keep the
pressure in the test bench constant at approx. 20 bar below the opening
pressure. During a time period of 30 seconds no ’dripping’ should occur at the
nozzle tip.
D The spray holes of nozzle tip 8 must not be flushed out unduly.
⇒ Injection valves which do not spray efficiently must be dismantled as
described in section 4. Often, a thorough cleaning suffices to make them fully
functional.
Remark: Nozzle tips with flushed out spray holes must be replaced by new ones.
Nozzle holder 5 and nozzle body 14 (Fig. ’D’) with poor sealing faces ’SF’ must
either be replaced or reconditioned by the manufacturer or an authorized
company.
ER-3 / 2013-08
Injection Valve: Checking, Dismantling, Assembling and Adjusting Injection Valve with FAST
To Next Page
Loading...
