SECTION 12 POWER
Page 2
TD-25M EXTRA DRESSTA
3. AIR INDUCTION SYSTEM TEST
1. Remove the end cover from the air cleaner. Remove both filter elements from the air cleaner.
See Operator’s Manual.
2. Using duct tape, mask outside diameter of the safety (small) element. Sealing must be air tight.
Reinstall the tapped element only and end cover.
3. Remove the air cleaner warning light switch (1, Fig. 12.1). Tee in a 0 to 100 [kPa] pressure
gauge.
4. Remove the plug (3) from the air intake connection (2). Connect a manually regulated
compressed air supply.
5. Adjust the air regulator until the pressure gauge registers 20 [kPa]. If pressure cannot be
reached, it may be necessary to rotate the engine crankshaft over slightly until a minimal
leakage occurs past the engine valves.
Fig. 12.1. Air Induction System Service Points
1. Air Cleaner Warning Light Switch
2. Air Intake Connection
3. Plug (M14x1.5)
4. Ether Injector Nozzle
6. Using a soap solution and a paint brush, coat the following places and check for leaks
(Fig. 12.2):
a. Air cleaner body surfaces around the outlet tube connections.
b. Air cleaner restriction indicator warning light switch to air cleaner.
c. All clamped hose connections between air cleaner outlet, including connections at
turbocharger, charge air cooler (CAC) to intake manifold flange.
7. No leakage is permitted between the air cleaner and suction side of the turbocharger and
between turbocharger outlet elbow, charge air cooler and intake manifold flange. If leakage at
the joints is detected, tighten hose clamps. If leakage still persists, remove the parts to
determine cause. Inspect and replace worn parts as necessary and retest.
8. Remove the filter element and remove the duct tape. Inspect the seals for damage. Reinstall
both elements and the end cover.
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