Advanced Products

Model: OK2

OK2 Hydraulic Oil Cooler

The OK2 provides up to 100,000 Btu/h of heat rejection. This unit is perfect for any oil or glycol cooling needs, and it has been field proven in some of the harshest environments. The OK2 is commonly used as a hydraulic oil cooler on equipment for the farm, forestry, and construction industries. It can also be used as an auxiliary engine cooler for equipment that overheats. The OK2 features two variable-speed EMP fans with long-life brushless motors and full reversibility to keep the heat exchanger clean through years of harsh use.

The OK2 is available in 12V and 24V, pusher and puller models. Control strategy can be configured as temperature control, PWM or CAN control, or simple on/off. Temperature controlled OK2 models feature the EMP uTMC system controller.

Front View
OK2 Chart
Install View
Install View
OK2 Schematic

Features & Benefits

EMP FiL Brushless Electric Fans

All OK2 coolers feature EMP fans. EMP's fans are brushless, controllable, reversible, and built from a cast aluminum shroud that can withstand even the harshest environments. Click here to learn more about EMP fans.


Type Specification Description
Max Heat Rejection Rate 100,000 Btu/h
Overal Package Weight (Without Fluid) 75 lbs.
Heat Exchanger Material Aluminum
Shroud Material Steel
Max Continuous Operating Temp 203° F
Min Continuous Operating Temp -40° F
Max Fluid Temp 266° F
Fan Configuration Push or Pull
Voltage 12 or 24 Volts
Max Current 50 Amps
Max Fan Speed 4000 RPM (14V)
4600 RPM (28V)
Max Continuous Operating Pressure 230 psi
Internal Bypass Pressure Valve 45 psi
SAE O-Ring Boss Port Size -20 (1 5/8in-12)
Maximum Fluid Flow Rate 45 GPM
Maximum Fluid Viscosity 77.5 ft2/hr
Heat Exchanger Fluid Volume 0.8 gal.
Control Inputs On/Off, CAN/J1939, PWM, or Thermistor
Fan Reversal Control Push Button, Timed, or Ignition On


Please click on the thumbnail below to view a larger version of the image.


The following kit options are available for this product. Any combination of options below can be choosen to configure the kit to your needs.

Voltage Configuration
12V 24V Push Pull
Optional Approval Rating
UL-Approved CSA-Approved
On/Off PWM J1939 CAN Thermistor EMP-Link



OK2 Hydraulic Oil Cooler for Loader Application

Downloads & Documents

The following documents are available for this product. Please feel free to download to obtain additional product information.