This document provides specifications for the Weichai America Corp. 12.5-liter TA natural gas/propane engine. It lists the model number, bore and stroke, displacement, cylinders, compression ratio, governor method, fuel type, aspiration, emission standard, dry weight, and power ratings. Key features of the engine and its systems - including the engine and block, cooling system, lubrication system, engine control system, air intake/exhaust, electrical system, and flywheel/housing - are summarized. Performance curves show power and fuel consumption data across operating ranges for both 1800 and 1500 RPM.

1. Model Number
Bore & Stroke
Displacement
Cylinders
Compression ratio
Governor Method
Fuel Type
Aspiration
Emission Standard
Dry Weight
Weichai America Corp.
3100 Golf Road
Rolling Meadows, IL 60008
Phone: 1-847-725-0300
www.weichaiamerica.com
1800 RPM
HP
321
kW
240
HP
174
kW
130
PROPANE
NATURAL GAS
POWER RATINGS (PRIME)
84.6 in / 2,150 mm
53.5 in
1,359 mm
44.7 in / 1,136 mm
FEATURES
Engine & Block
• Cast Iron Block
• One-piece forged crankshaft
• Separate cast iron cylinder heads and replaceable dry
cylinder liners
• Forged Connecting Rod
Cooling System
• Radiator and hoses supplied separately
• Thermostatically-controlled system with belt driven water
pump and Pusher/Puller fan
Lubrication System
• Flat bottom high capacity oil pan (36 L)
• Spin-on full-flow oil filter
• Maintenance free breather system
Engine Control System
• Proven ECM, Fuel System and Engine Control
• Engine Protection
• CANBUS J1939 Standard Interface
• Telematics Compatibility
Air Intake & Exhaust System
• Rear Mounted, Replaceable Dry Air Cleaner
• Air Cleaner Restriction Indicator
Electrical System
• 24V electric starter motors
• Optional low voltage battery charging alternator
FLywheel & Housing
• SAE 1/SAE 3 flywheel housing and 11.5/14” flywheel
12.5-LITER ENGINE DATA
WP13GTA
5.0 in x 6.5 in (127 mm x 165 mm)
765 cid (12,540 cc)
6
9.7:1
ECM
Natural Gas / Propane
TA
EPA Certified
2,337 lb (1,060 kg)
12.5LTA IRRIGATION
321 HP @1800 rpm – NG
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
SAE 1 Flywheel Housing and SAE 14" Flywheel
1-855-922(WAC)-9001
180 241

2. Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

3. Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

4. FEATURES
Engine & Block
• Cast Iron Block
• One-piece forged crankshaft
• Separate cast iron cylinder heads and replaceable dry
cylinder liners
• Forged Connecting Rod
Cooling System
• Radiator and hoses supplied separately
• Thermostatically-controlled system with belt driven water
pump and Pusher/Puller fan
Lubrication System
• Flat bottom high capacity oil pan (36 L)
• Spin-on full-flow oil filter
• Maintenance free breather system
Engine Control System
• Proven ECM, Fuel System and Engine Control
• Engine Protection
• CANBUS J1939 Standard Interface
• Telematics Compatibility
Air Intake & Exhaust System
• Rear Mounted, Replaceable Dry Air Cleaner
• Air Cleaner Restriction Indicator
Electrical System
• 24V electric starter motors
• Optional low voltage battery charging alternator
FLywheel & Housing
• SAE 1/SAE 3 flywheel housing and 11.5/14”
flywheel
12.5LTA POWER GEN @1800rpm
207kWe
262kWe
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

5. 0
10
20
30
40
50
60
70
80
150
200
250
300
350
400
450
22 56 78 111 132 145 178 204 225 245
Power (kW)
Total
Fuel(m³/h)
BSFC(g/kW.h)
0
5
10
15
20
25
30
200
250
300
350
400
450
500
550
600
650
700
15 35 55 75 95 115 135 155 175 195
Total
Fuel(gal/h)
BSFC(g/kW.h)
Power(kW)
Rating Fuel
60HZ (1800RPM) 50HZ (1500RPM)
kWm kWe kWm kWe
PRP
NG 240 207 230 205
PG 180 150 150 130
STP
NG 299 262 250 223
PG 180 150 150 130
84.6 in / 2,150 mm
53.5 in
1,359 mm
44.7 in / 1,136 mm
WP13GTA
5.0 in x 6.5 in (127 mm x 165 mm)
765 cid (12,540 cc)
6
9.7:1
ECM
Natural Gas / Propane
TA
EPA Certified
2,337 lb (1,060 kg)
(Natural Gas) (Liquid Propane Gas)
(Natural Gas) (Liquid Propane Gas)
12.5-LITER TA ENGINE DATA
Model Number
Bore & Stroke
Displacement
Cylinders
Compression ratio
Governor Method
Fuel Type
Aspiration
Emission Standard
Dry Weight
Weichai reserves the right to interpret
products and specifications, All data is
subject to change without notice.
Weichai America Corp.
3100 Golf Road Rolling Meadows, IL 60008
Phone: 1-855-922(WAC)-9001
www.weichaiamerica.com
0
10
20
30
40
50
60
70
80
90
100
190
240
290
340
390
440
490
30 60 75 90 120 150 180 210 225 240 270 290 299
Power (kW
)
Total
Fuel(m³/h)
BSFC(g/kW.h)
0
5
10
15
20
25
200
250
300
350
400
450
500
550
600
650
700
10 30 50 70 90 110 130 150
Total
Fuel(gal/h)
BSFC(g/kW.h)
P
o
w
e
r
(
k
W)
POWER RATINGS
1800RPM Fuel Consumption Curve
1500RPM Fuel Consumption Curve
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com