Page 1609 of 1943
HT003±01
D09721
D09722
D09723O±Ring
D09724
± HYBRID TRANSAXLEOIL PUMP ASSEMBLY
HT±3
1376 Author: Date:
2001 PRIUS (RM778U)
OIL PUMP ASSEMBLY
ON±VEHICLE REPAIR
1. REMOVE ENGINE UNDER COVER LH
2. REMOVE OIL PUMP
(a) Remove the plug.
(b) Remove the O±ring from the plug.
(c) Remove the 5 bolts and oil pump cover.
(d) Remove the O±ring.
(e) Remove the oil pump driven rotor and drive rotor.
Page 1610 of 1943
D09725
D09724
D09723
O±Ring
D09722
D09721
HT±4
± HYBRID TRANSAXLEOIL PUMP ASSEMBLY
1377 Author: Date:
2001 PRIUS (RM778U)
(f) Remove the oil pump drive shaft.
3. INSTALL OIL PUMP
(a) Apply ATF to each sliding part.
(b) Install the oil pump drive shaft.
(c) Install the oil pump driven rotor and drive rotor.
(d) Install a new O±ring.
(e) Apply liquid sealer to 2 or 3 threads of the bolt end.
Sealant:
Part No. 08833±00080, THREE BOND 1344, LOCTITE
242 or equivalent
(f) Install the oil pump cover with the 5 bolts.
Torque: 5.5 N´m (56 kgf´cm, 49 in.´lbf)
(g) Install a new O±ring and the plug.
Torque: 7.35 N´m (75 kgf´cm, 65 in.´lbf)
4. INSTALL ENGINE UNDER COVER LH
Page 1611 of 1943

D09920Drain Plug
D09925
Oil Level
0 ± 5 mm
HT005±01
D09921Drain Plug
D09778
Shop Rag
D09899
HT±6
± HYBRID TRANSAXLEHYBRID TRANSAXLE UNIT
1379 Author: Date:
2001 PRIUS (RM778U)
HYBRID TRANSAXLE UNIT
ON±VEHICLE REPAIR
1. REPLACE TRANSAXLE OIL
Fluid type: ATF Type T±IV
Capacity: 4.6 liters (4.9 US qts, 4.0 Imp. qts)
Torque: 49 N´m (498 kgf´cm, 36 ft´lbf)
2. REPLACE COOLANT
(a) Remove the reservoir tank cap of the inverter.
(b) Remove the drain plug and drain the coolant.
(c) Install the drain plug with a new gasket.
(d) Loosen the 2 bleeder plugs and connect the hoses.
HINT:
To prevent coolant from splashing, place a shop rag on the
overflow pipe as shown in the illustration.
(e) Supply coolant from the reservoir tank.
(f) Supply coolant until coolant level in the hose connected
to the bleeder plugs reaches the same level with FULL of
the reservoir tank as shown in the illustration.
(g) Tighten the 2 bleeder plugs.
(h) Turn the ignition switch ON and active the water pump.
(i) Leave it as it is for approx. 20 seconds.
(j) Turn the ignition switch OFF.
(k) Loosen the 2 bleeder plugs to bleed air.
(l) Close the 2 bleeder plugs again.
Page 1612 of 1943
D09898
Coolant Level
± HYBRID TRANSAXLEHYBRID TRANSAXLE UNIT
HT±7
1380 Author: Date:
2001 PRIUS (RM778U)
(m) Report the step (h) to (l) until the operation sound of the
pump becomes lower and Coolant in the reservoir tank
moves faster.
(n) With the ignition switch ON, wait for applox. 5 minutes.
(o) Adjust the coolant level inside the reservoir tank as shown
in the illustration.
Page 1613 of 1943
HT00A±01
D09787 Non±reusable part
N´m (kgf´cm, in.´lbf): Specified torque Power Cable Cover
High±Voltage Cable Housing Tube
Oil Seal
Motor Generator
No. 1 Assembly
Water Jacket Union
Wiring Harness Connector
Gasket
Drain PlugLock Sleeve
Cam Guide Sleeve
Sleeve Bracket
Torsion Spring
Parking Lock Pawl Shaft Lock Clamp
5.4 (55, 48 in.´lbf)
Parking Lock Pawl
Counter Driven Gear Assembly
Outer Race
50 (510, 37)
15 (152, 11)
13 (130, 9)
39 (400, 29)
5.5 (56, 49 in.´lbf)
Outer RaceOuter Race
Shim
Shim
Outer Race
Differential Case Assembly
Shim
Chain
Counter Drive Gear Assembly
Input Shaft AssemblyNeedle Roller Bearing
Bearing RaceDrive SprocketPlanetary Ring Gear
Bearing Race
Ring Gear FlangeShim
18 (183, 13)
4.8 (48, 42 in.´lbf)5.5 (56, 49 in.´lbf)
12.7 (130, 9)
Screw Plug25 (250, 18)
x 13
5.5 (56, 49 in.´lbf)
Needle Roller Bearing
HT±12
± HYBRID TRANSAXLEHYBRID TRANSAXLE ASSEMBLY
1385 Author: Date:
2001 PRIUS (RM778U)
HYBRID TRANSAXLE ASSEMBLY
COMPONENTS
Page 1614 of 1943

D09916
13 (130, 10)
x 5
Oil Seal
Parking Shaft Cover
Washer
Parking Lock Shaft
PinSpacer
Parking Lock Lever No. 3
Mounting Bracket
Motor Water Jacket Cover
5.5 (56, 49 in.´lbf)x 6
Parking Cover
5.5 (56, 49 in.´lbf)
x 6 Detent Spring
Detent Spring Cover
10 (100, 7)
Oil Seal Screw Plug
24.5 (250, 18)
Filler Plug
39 (400, 29)
Gasket
Screw Plug
24.5 (250, 18)
25 (250, 18)x 8
50 (510, 37)
Filler Plug
39 (400, 29)
Gasket
Wiring Harness Connector
5.5 (56, 49 in.´lbf)
5.5 (56, 49 in.´lbf)
Oil Pump Drive Shaft
Driven Rotor
Drive Rotor
O±Ring O±Ring
Magnet
Oil Strainer
Gasket
5.5 (56, 49 in.´lbf)
Oil Pan
7.6 (77, 67 in.´lbf)x 12
Gasket
Drain Plug
Non±reusable part
N´m (kgf´cm, in.´lbf): Specified torqueOil Pump Cover
x 5
5.5 (56, 49 in.´lbf)
7.35 (75, 65 in.´lbf)
Plug O±Ring
Motor Generator No. 2
Assembly
Water Jacket Union
Wiring Harness Connector
Breather Plug
11.3 (111, 8)
52 (530, 38)
49 (498, 36)
± HYBRID TRANSAXLEHYBRID TRANSAXLE ASSEMBLY
HT±13
1386 Author: Date:
2001 PRIUS (RM778U)
Page 1615 of 1943
HT00B±01
D09694
D09695
D09696
HT±14
± HYBRID TRANSAXLEHYBRID TRANSAXLE ASSEMBLY
2001 PRIUS (RM778U)
DISASSEMBLY
1. INSTALL ENGINE HUNGER
Install the engine hanger onto the MG1 side as shown in the il-
lustration, and lift it up by a chain device.
Engine hanger part No.:
12281±67070, S1228±11781
Bolt part No.:
91642±81045
91642±81265 2 pieces
Nut part No.:
90178±10001
90179±12147 2 pieces
NOTICE:
As the transaxle itself is heavy, place a wood block
underneath to stabilize it and carry out the operation
carefully.
Do not pull or bend the high±voltage cable of the MG1
assembly.
Drain the fluid before disassembly.
2. REMOVE MG1 ASSEMBLY
(a) Remove the 21 bolts.
(b) Using a screwdriver and a hammer, disconnect the MG1
assembly from the MG2 assembly.
Page 1616 of 1943
D09697
D09698
D09699
D09926
D09700
± HYBRID TRANSAXLEHYBRID TRANSAXLE ASSEMBLY
HT±15
2001 PRIUS (RM778U)
HINT:
When separating the MG1 assembly from the MG2 assembly,
to prevent the drive sprocket from being removed with the MG1
assembly, push down the chain part with a taped screwdriver
tip.
3. REMOVE COUNTER DRIVEN GEAR ASSEMBLY
Remove the counter driven gear assembly from the MG2 as-
sembly.
4. REMOVE DIFFERENTIAL CASE ASSEMBLY
Remove the differential case assembly from the MG2 assem-
bly.
5. REMOVE 2 RACE AND NEEDLE ROLLER BEARING
6. REMOVE DRIVE SPROCKET SUB±ASSEMBLY AND
CHAIN