To install an Equus oil pressure gauge, you need to follow a series of steps carefully to ensure the correct installation and maintain the functionality of your vehicle’s systems. This comprehensive guide will walk you through the process step-by-step.
Tools and Materials Required
- Crescent wrench or 24mm deep socket
- 1/8″ NPT female to 1/8-29 BSPT male adapter
- 1/8″ NPT T-fitting
- Teflon tape
- New oil pressure sender provided with the gauge
- Warning light lead wire
Step-by-Step Installation Guide
1. Prepare the Vehicle
- Ensure the engine is cool and the ignition is off.
- Disconnect the negative (-) battery cable to prevent any electrical shocks or damage.
2. Locate and Remove Existing Oil Pressure Sender
- Identify the existing oil pressure sender on your engine block.
- Disconnect the wiring from the existing oil pressure sender.
- Remove the existing oil pressure sender using a crescent wrench or 24mm deep socket.
3. Install T-Fitting
- If you need to maintain the functionality of the idiot light switch, use a T-fitting. This allows both the new oil pressure sender and the original sender to be connected.
- Screw the 1/8″ NPT T-fitting to the 1/8″ NPT-1/8-29 BSPT adapter before bolting it onto the engine block.
- Bolt the adapter to the block securely.
4. Install New Oil Pressure Sender
- Screw the new oil pressure sender into the T-fitting. Ensure all threads are coated with teflon tape to prevent leaks.
- Be careful not to apply excessive weight to the T-fitting when screwing on the oil sender.
5. Connect Wiring
- Connect the warning light lead wire to the warning light terminal on the oil pressure sender. This is usually labeled as “W.L./G.” or “WK”.
- Ensure all electrical connections are secure and not loose.
6. Verify Compatibility
- Check that the thread size of the vehicle’s sending unit port is compatible with the thread size on the gauge’s sending unit and/or the supplied adapters. Common sizes include 1/8″ NPT.
- Do not drill any holes in the dash before ensuring compatibility.
7. Reconnect Battery and Test
- Reconnect the negative (-) battery cable.
- Start the engine and check the gauge for proper operation and ensure the warning light functions correctly if applicable.
Compatibility Considerations
Thread Size Compatibility
Ensure the thread size of the new sending unit matches the existing port on the engine block. Common sizes include 1/8″ NPT and 1/8-29 BSPT.
T-Fitting
Use a T-fitting to accommodate both the new gauge sending unit and the original sender, if necessary, to maintain the functionality of the idiot light switch.