Using The Special Tool; Pressure Gage Assembly - TOHATSU TLDI 40 Service Manual

2. Using the Special Tool

q Pressure Gage Assembly
Measuring Fuel and Air Pressure
1. Mover the lever for cock (3T5-72883-0) to position A shown in the figure below.
2. Screw adapter B (3T5-72884-0) into either the air or fuel pressure measuring valves located on the air
rail.
Caution:
A small amount of fuel will spurt out as the adapter is inserted in the fuel measuring valve.
3. With the ignition key set the OFF position, turn it to START to activate the starter motor and turn over
the engine for approximately 15 seconds. (Once the engine starts, allow it to idle at 700 rpm for
approximately for 15 minutes.)
4. If both fuel and air pressure values fall within the standard (rated) range, engine operation is normal.
(If not, service the engine by referring to the relevant sections in this manual.)
PRESSURE
AIR PRESSURE
FUEL PRESSURE
5. When finished measuring, turn the lever to position B (open) to relieve internal pressure; then remove
adapter B from the measuring valve.
It is important to have a container handy. Once fuel measuring completes and the lever is set to
position B (open), a certain amount of fuel will spurt out from the hose (98AB-5-0200). Be sure to
point the hose (98AH-8-1000) on the cock side lower than valve position and drain all remaining fuel
prior to removing adapter B.
0.5
0
MPa
AIR
0.55MPa
3T5728800
Label
Valve assembly
Valves for measuring fuel or air pressure.
Rated value (MPa, psi)
0.55, 80
0.62, 90
A Lever position (closed)
when measuring pressure.
B Lever position (open)
when removing pressure.
Cock (3T5-72883-0)
1.0
FUEL
0.62MPa
Cap
Air rail assembly
Rated range (MPa, psi)
0.55 ± 0.03, 80 ± 4
0.62 ± 0.03, 90 ± 4
Adapter B
3T5-72884-0
Replace the following components
in the case that either fuel or air
leaks out after the adapter has
been fully screwed in.
Seal joint
3T5-72888-0
2-19
Remarks
Pressure falls when engine stops
turning over.