DRIVE TRAIN SECTION 7
Page 27
DRESSTA TD-25M EXTRA
SERVICE DIAGNOSIS
15. TRANSMISSION “FIVE PENNY” DIAGNOSTIC TEST
This test is designed to assist in the diagnosis of a problem with the machine transmission and to
help determine if the transmission needs to be removed and disassembled or if the problem is in
the hydraulic components which are external to the transmission assembly.
If there is complaint of low pressure or slippage in the transmission, pressure test should be
performed and pressures of all circuits must be recorded for future comparisons; refer to
TRANSMISSION AND TORQUE CONVERTER OIL PRESSURE TEST in this Section. If the
pressure test shows that there is low pressure in one or more circuits, then “Five Penny” Test may
be done.
“Five Penny” Test Procedure
1. Remove the range selector valve; refer to RANGE SELECTOR VALVE in TRANSMISSION,
SECTION 7C.
Fig. 7.9. Pennies (Disks) Placing on the Underside of the Range Selector Valve
1. Transmission Assy
2. Transmission Manifold
3. Orifice Strainer
4. Manifold Gasket
5. Pressure Regulator Valve
6. Penny Coins (or Small Disks φ 21.3 [mm] dia. and 2 [mm] thick)
7. O-Ring
7A. O-Ring
8. Rate of Rise Valve
9. Rate of Rise Valve Gasket
10. Range Selector Valve
To Next Page
Loading...