L7042GL

STANDARD EQUIPMENT
AIR CLEANER – Two, 3" dry type filter with hinged rain shield and service indicator.
BARRING DEVICE – Manual.
VHP® Series
Gas Engine
BATTERY BOX – Ship loose battery box designed to accommodate two series 31 12 VDC batteries. Includes power disconnect
switch and 20 foot (6.1 m) cable for connection to ESM Power Distribution Box.
BEARINGS – Heavy duty, replaceable, precision type.
BREATHER – Self regulating, closed system.
CONNECTING RODS – Drop forged steel, rifle drilled.
Extender Series®
CONTROL SYSTEM – Waukesha Engine System Manager (ESM) integrates spark timing control, speed governing, detonation
detection, start-stop control, diagnostic tools, fault logging and engine safeties. Engine Control Unit (ECU) is central brain
886 - 1547 BHP
of the control system and main customer interface. Interface with ESM is through 25 foot (7.6 m) harness to local ((660 - 1154 kWb))
panel, through MODBUS RTU slave connection RS-485 multidrop hardware, and through the Electronic Servicee
Program (ESP). Customer connections are only required to the local panel, fuel valve, and 24V DC power supply. y.
Compatible with Woodward load sharing module. ESM meets Canadian Standards Association Class I, Division
2, Group D, hazardous location requirements. ESM controlled prechamber logic.
CRANKCASE – Integral crankcase and cylinder frame. Main bearing caps drilled and tapped for temperature
sensors. Does not include sensors.
CRANKSHAFT – Counterweighted, forged steel, seven main bearings, and dynamically balanced.
CYLINDERS – Removable bainitic cast iron wet type cylinder liners, chrome plated on outer diameter.
CYLINDER HEADS – Twelve interchangeable. Two hard faced intake and two hard faced exhaust valves per
cylinder. Hard faced intake and exhaust valve seat inserts. Roller valve lifters and hydraulic push rods.
Includes prechamber and related fuel control valves.
ELECTRONIC SERVICE PROGRAM (ESP) – Microsoft® Windows-based program provided on CD-ROM for
programming and interface to ESM. Includes E-Help for troubleshooting any ESM faults. Serial harness is provided ded for
connection of a customer supplied laptop to the ECU RS-232 port.
ENGINE ROTATION – Counterclockwise when facing flywheel.
ENGINE MONITORING DEVICES – Factory mounted and wired sensors for lube oil pressure and temperature; intake ake
manifold temperature and pressure; overspeed; and jacket water temperature; all accessible through ESM . ESM SM
continually monitors combustion performance through accelerometers to provide detonation protection. Dual magnetic
pick-ups are used for accurate engine speed monitoring. ESM provides predictive spark plug diagnostics as well ell as
advanced diagnostics of engine and all ESM sensors and logs any faults into non-volatile flash memory. Engine shown without Extender Series
EXHAUST THERMOCOUPLES – 14 K-type thermocouples. One for each individual cylinder and one pre-turbine for each bank
Options.
and 25 foot (7.6 m) harness.
EXHAUST OUTLET – Single vertical at rear. Flexible stainless steel connection with 8" (203 mm) pipe flange.
FLYWHEEL – Approx. WR2 = 155000 lb-in2; with ring gear (208 teeth), machined to accept two drive adapters: 31.88" (810 mm)
Model L7042GL
pilot bore, 30.25" (768 mm) bolt circle, (12) 0.75"–10 tapped holes; or 28.88" (734 mm) pilot bore, 27.25" (692 mm) bolt circle,
(12) 0.625"–11 tapped holes and (12) 0.75"–10 tapped holes. with ESM®
FLYWHEEL HOUSING – No. 00 SAE. Turbocharged and Intercooled, Lean
FUEL SYSTEM – Single 3" ANSI flange fuel inlet connection. Dual natural gas, 4" (102 mm) duplex updraft carburetors. Combustion, Twelve Cylinder, Four-Cycle
Two mounted Mooney Flowgrid 250, 2" (51 mm) gas regulators, 43 – 60 psi (296 – 414 kPa) gas inlet pressure required.
Prechamber fuel system and control logic. 10 foot (3 m) harness provided for ESM control of customer supplied fuel shutoff
Gas Fueled Engine
valve.
GOVERNOR – Electric throttle actuator controlled by ESM with throttle position feedback. Governor tuning is performed using
ESP. ESM includes option of a load-coming feature to improve engine response to step loads.
S P E C I F I CAT I O N S
IGNITION SYSTEM – Ignition Power Module (IPM) controlled by ESM, with spark timing optimized for any speed-load
condition. Dual voltage energy levels automatically controlled by ESM to maximize spark plug life.
Cylinders Lube Oil Capacity
INTERCOOLER – Air–to–water. V 12 190 gal.
LEVELING BOLTS
Piston Displacement (719 L)
LIFTING EYES – Requires 9.5 ton Working Load Limit (W.L.L.) anchor shackles.
LUBRICATION – Full pressure, gear type pump. Engine mounted full flow lube oil micro-fiberglass filters. MICROSPIN® 7040 cu. in. Starting System
bypass filter, engine mounted. Air/gas motor driven prelube pump, requires final piping. (115 L) 125 - 150 psi air/gas
MANIFOLDS – Exhaust, (2) water cooled.
OIL COOLER – Shell and tube type, with thermostatic temperature controller and pressure regulating valve. Factory mounted. Bore & Stroke 24/32V electric
OIL PAN – Deep sump type. 190 gallon (719 L) capacity including filter and cooler. 9.375" x 8.5" Dry Weight
PAINT – Oilfield orange primer.
PISTONS – Aluminum with floating pin. Oil cooled. (238 x 216 mm) 21,000 lb.
SHIPPING SKID –For domestic truck or rail. Compression Ratio (9525 kg)
TURBOCHARGERS – Two, dry type. Wastegate controlled.
VIBRATION DAMPER – Two, viscous type. Guard included with remote mounted radiator or no radiator.
10.5:1
WATER CIRCULATING SYSTEM, AUXILIARY CIRCUIT – Belt driven water circulating high capacity pump for intercooler Jacket Water
and lube oil cooler. See S6543-38 performance curve for use with standard 10" diameter crankshaft pulley. Includes
System Capacity
thermostatic valve.
WATER CIRCULATING SYSTEM, ENGINE JACKET – Belt driven water circulating pump, cluster type thermostatic 107 gal.
temperature regulating valve, full flow bypass type. Flange connections and mating flanges for (2) 4" (102 mm) inlets and (1) (405 L)
5" (127 mm) outlet.
POWER RATINGS: L7042GL VHP® GAS ENGINES

Brake Horsepower (kWb Output)

I.C. Water Inlet Temp.
Model °F (°C) (Tcra) C.R. 800 rpm 900 rpm 1000 rpm 1100 rpm 1200 rpm
L7042GL 85° (29°) 10.5:1 928 (692) 1160 (865) 1289 (961) 1418 (1057) 1547 (1154)
L7042GL 130° (54°) 10.5:1 886 (661) 1110 (828) 1233 (919) 1357 (1012) 1480 (1104)

Rating Standard: All models: Ratings are based on ISO 3046/1-1995 with mechanical efficiency of 90% and auxiliary water temperature Tcra (clause 10.1) as specified above
limited to ± 10° F (± 5° C). Ratings are also valid for SAE J1349, BS5514, DIN6271 and AP17B-11C standard atmospheric conditions.
ISO Standard Power/Continuous Power Rating: The highest load and speed which can be applied 24 hours a day, seven days a week, 365 days per year except for normal
maintenance. It is permissible to operate the engine at up to 10% overload, or maximum load indicated by the intermittent rating, whichever is lower, for two hours in each 24
hour period.
All natural gas engine ratings are based on a fuel of 900 Btu/ft3 (35.3 MJ/nm3) SLHV, with a 91 WKI®.
For conditions or fuels other than standard, contact the Dresser Waukesha Application Engineering Department.

PERFORMANCE: L7042GL VHP® GAS ENGINES

English 130° F ICW 85° F ICW Metric 54° C ICW 29° C ICW
NOX NOX
Settings RPM 1200 1000 1200 1000 Settings RPM 1200 1000 1200 1000
Power (Bhp) 1480 1233 1547 1289 Power (kWb) 1104 919 1154 962
BSFC (Btu/bhp-hr) 7135 6850 7160 6865 BSFC (kJ/kW-hr) 10089 9686 10124 9707
1.5 g NOX

1.5 g NOX
NOx (grams/bhp-hr) 1.50 1.50 1.50 1.50 NOx (g/nm3) 0.62 0.62 0.62 0.62
CO (grams/bhp-hr) 2.65 2.65 2.65 2.65 CO (g/nm ) 3
1.09 1.09 1.09 1.09
NMHC (grams/bhp--hr) 0.70 0.80 0.80 0.90 NMHC (g/nm3) 0.29 0.41 0.33 0.37

NOTES:
1) Fuel consumption and exhaust emissions are based on ISO 3046/1-1995 standard reference conditions and commercial quality natural gas of 900 Btu/ft3
(35.38 MJ/m3 [25, V(0; 101.325)]) saturated lower heat value, Waukesha Knock Index® of 91 and 93% methane content by volume. ISO 3046/1-1995 standard reference
conditions are 77°F (25°C) ambient temperature, 29.54 inches Hg (100 kPa) barometric pressure, 30% relative humidity (1kPa/0.3 inches Hg water vapor pressure).
2) S.I. exhaust emissions are corrected to 5% O2 (0°C and 101.325 kPa).
3) Data will vary due to variations in site conditions. For conditions and/or fuels other than standard, consult the Dresser Waukesha Application Engineering Department.
4) Fuel consumption based on ISO 3046/1-1995 with a +5% tolerance for commercial quality natural gas having a 900 Btu/ft3 saturated low heat valve

Consult your local Waukesha Distributor for system application assistance. The manufacturer reserves the right to change or modify without notice, the design or equipment specifications
as herein set forth without incurring any obligation either with respect to equipment previously sold or in the process of construction except where otherwise specifically guaranteed by the
manufacturer.

85" 147"
(2159 mm) (3734 mm)

97.83"
(2485 mm)

Bulletin 7005 1008

Dresser Waukesha
1101 West St. Paul Avenue · Waukesha, WI 53188-4999
Phone: (262) 547-3311 · Fax: (262) 549-2795
Waukesha
©2008 Dresser Inc. Waukesha, VHP, Extender Series, ESM, Microspin, and Waukesha Knock Index
are trademarks/registered trademarks of Dresser Waukesha, Dresser, Inc.
www.dresser.com