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9-59

PTT gear pump

Assembling the gear pump

Lubricate the parts using ATF Dexron II dur-

ing assembly.

When assembling the PTT unit, do not use

a rag. Otherwise, dust and particles could

get on the PTT unit components, causing

poor performance.

1. Install a new O-ring “1” and the valve

seat “2”.

2. Install the drive gear “1”, driven gear “2”,

balls “3”, and pins “4”, and then install the

gear housing “5”.

3. Install new O-rings “1” and “2” and the

bracket “3”, and then tighten the pump

bracket bolts “4” and “5” to the specified

torque.

4. Install a new valve seal “1”, the valve pin

“2”, and the spring “3”, and then install

the valve lock screw “4”.

5. Install a new O-ring “5” to the valve sup-

port pin “6”.

6. Install the ball “7”, valve support pin “6”,

and spring “8”, and then install the valve

lock screw “9”.

TIP:

• Install the valve lock screw “4” and valve

lock screw “9” to the height “a” and depth

“b” that were measured before removing

them.

• If installing new parts, install them accord-

ing to the preceding reference data.

Pump bracket bolt (M5) “4”:

7 N·m (0.7 kgf·m, 5.2 ft·lb)

Pump bracket bolt (M4) “5”:

4 N·m (0.4 kgf·m,, 3.0 ft·lb)

Yamaha F150A Service Manual

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