Section 03 ENGINE
Sub-Section 02 (LEAK TEST)
03-02-3
Install plates
no. 4
with fasteners from the kit and
tighten adequately.
NOTE:
On engines with the RAVE system, the
boot and O-ring can be checked for leakage with
the valve in place. Simply remove the cover to ex-
pose the boot.
Make sure the spark plugs are installed and tight-
en.
Block pulse hose using a hose pincher.
NOTE:
Do not block the rotary valve shaft hoses.
Install pump to the exhaust plate fitting.
717 ENGINES
1. Intake plates
2. Pulse hose blocked with a hose pincher
3. Exhaust plate
787 ENGINE
1. Intake plates
2. RAVE valve plates
3. Pulse hose blocked with a hose pincher
4. Exhaust plate
Activate pump and pressurize engine to 34 kPa (5 PSI).
Wait 3 minutes and check if pressure drops; if so,
verify all testing components.
If kit components are not leaking, verify engine
jointed surfaces as per following areas:
– spark plugs
– cylinder head gasket
– cylinder base gasket
– crankcase halves
– rotary valve cover
– engine plugs
– exhaust manifold
– intake manifold (717 engines)
– oil injection pump (717 engines)
Check also small oil injection pump lines and fit-
tings; check for air bubbles or oil column going to-
ward pump, which indicate a defective check
valve.
If the above mentioned components are not leak-
ing, block both oil hoses of the rotary valve shaft
using hose pinchers.
NOTE:
If leakage stops at this point, proceed with
Rotary Valve Shaft
testing.
If there is still some leakage, remove the PTO fly-
wheel to verify outer seal.
If no leak is found on the PTO side outer seal, re-
move magneto flywheel and verify crankshaft
outer seals.
Proceed with the
Rotary Valve Shaft
testing if
the crankshaft outer seals are not leaking.
F01B2ZA
2
3
1
F01B30A
2
4
1
3
-
CAUTION
Do not exceed this pressure.
To Next Page
Loading...
Need help?
General