Tractor Hydraulic Remotes (Rear Remotes / SCVs) Guide
Last updated: 2/2026
Hydraulic remotes are the quick-connect coupler sets on the rear of your tractor that let you power hydraulic cylinders and motors on rear-mounted implements. If you run a grapple, hydraulic top link, offset mower, angle blade, backhoe, or log splitter off the back of your machine, you are using rear remotes.
This guide covers what rear remotes are, how they compare to a third-function valve, how many you actually need, which implements require them, a high-level installation overview, pressure testing tools, leak prevention, and sealant best practices. No calculators or downloads, just clear reference material for compact and utility tractor owners.
What Are Tractor Hydraulic Remotes?
Tractor hydraulic remotes are also called rear remotes or SCVs (Selective Control Valves). They are quick-connect hydraulic coupler sets mounted at the rear of the tractor that provide pressure and return lines to operate hydraulic cylinders or motors on rear implements.
- Each remote provides one hydraulic circuit with A and B ports (extend and retract)
- Most tractors support 1 to 3 rear remote sets, some larger machines allow more
- Typical flow per remote: 5 to 15 GPM depending on the tractor's hydraulic pump
- Typical operating pressure: 2,000 to 3,000 PSI
- Adding more valve sections does NOT increase pump output. Flow is split between active circuits.
Rear Remotes vs Third Function
Many tractor owners confuse rear remotes with a third-function valve. They serve different purposes and are located in different places on the machine.
| Feature | Rear Remotes | Third Function |
|---|---|---|
| Location | Rear of tractor | Front loader |
| Typical Use | Top link, angle blades, backhoe | Grapples, front hydraulic tools |
| Controlled By | Rear levers or electric switches | Loader joystick button |
Many tractors have both: a third function for front implements and rear remotes for 3-point hydraulic attachments. They are independent circuits that draw from the same pump.
How Many Rear Remotes Do I Need?
Match the number of remote sets to the number of independent hydraulic movements you want to control.
1 Set
- Hydraulic top link
- One angle blade cylinder
- Single cylinder function
2 Sets
- Top + tilt setup
- Offset + tilt mower
- Two-function implements
3+ Sets
- Multi-cylinder implements
- Complex rear hydraulic tools
- Backhoe with independent boom, stick, and bucket circuits
Each remote set equals one independent hydraulic circuit. Adding more sets does not add more flow, it divides the existing pump output when multiple circuits run simultaneously.
What Implements Require Rear Hydraulic Remotes?
Material Handling
- Rear log splitters
- Hydraulic grapples (rear-mounted)
Land & Mowing
- Offset/side-shift mowers
- Hydraulic angle rear blades
- Flail mowers with tilt/shift
Ground & Utility
- Hydraulic top link
- Top-and-tilt systems
- Post drivers
- Backhoe controls (varies by setup)
Related Guides
Installation Overview (High-Level)
This is an educational overview of what rear remote installation involves. Always follow the specific instructions from your valve kit manufacturer and your tractor's service manual.
Preparation
- Park on level ground
- Shut engine off
- Relieve hydraulic pressure
- Disconnect loader if required for access
Valve Assembly
- Install valve bank per manufacturer instructions
- Lubricate all O-rings before assembly
- Install fittings to correct torque specifications
Mounting
- Secure valve bracket near the 3-point hitch or loader valve area
- Ensure the mounting location allows clear hose routing
Hose Routing
- Connect Power Beyond (PB) pressure line from tractor to valve inlet
- Connect tank/return line from valve to tractor reservoir
- Route all hoses away from heat sources and pinch points
Controls
- Install manual lever or electric solenoid controls
- Add inline fuse for electric solenoid systems
- Route wiring away from moving parts
Testing
- Refill hydraulic fluid to proper level
- Cycle each remote slowly through full range of travel
- Check every fitting and connection for leaks
Safety Warning
Never check for hydraulic leaks with bare hands. Hydraulic fluid under pressure can penetrate skin and cause injection injuries that require immediate emergency medical treatment. Use cardboard or paper to detect leaks, not your fingers.
Tools to Test Hydraulic Remote Pressure
| Tool | Purpose | Typical Cost |
|---|---|---|
| Pressure Gauge Kit (0-5,000 PSI) | Measure system pressure at the coupler | $50 - $150 |
| Tee Adapter | Dual-port testing without disconnecting lines | $20 - $40 |
| Flow Meter (optional) | Measure GPM through the circuit | $200+ |
Basic Pressure Test Steps
- 1Attach pressure gauge to one of the rear remote coupler ports
- 2Warm the tractor to normal operating temperature
- 3Test at low RPM first, then increase to rated RPM
- 4Compare the reading to the manufacturer specification in your service manual
Preventing Hydraulic Remote Leaks
Post-Repair Best Practices
- Always use new O-rings during reassembly
- Lubricate O-rings with clean hydraulic oil before installation
- Do not over-torque fittings (follow the torque spec for each fitting type)
- Depressurize the system before reconnecting any lines
- Clean couplers thoroughly before connecting
Routine Maintenance
- Inspect hoses weekly for abrasion, cracking, or bulging
- Replace any cracked or damaged lines immediately
- Change hydraulic fluid and filters per the manufacturer schedule
- Cap unused coupler ports to keep out dirt and moisture
Usage Habits
- Cycle remotes slowly during initial tests after any service
- Avoid shock loads that spike pressure beyond system rating
- Disconnect and store implements overnight to relieve standing pressure on seals
Keep Your Hydraulics Running Right
Diagnostic gear, couplers, and correct fluid prevent most hydraulic remote failures.
Some links below are affiliate links, including Amazon Associate links. As an Amazon Associate, Tractor Iron earns from qualifying purchases, at no additional cost to you.
VEVOR Hydraulic Pressure Test Kit (5 Gauges)
10/100/250/400/600 bar gauges with couplings, tees, and hoses in a case. Diagnose weak remotes, loader, and 3-point hydraulics, made for tractors and machinery.
$131.67
Check Price at VEVOR
VEVOR 1/2" Flat-Face Hydraulic Couplers (4 Sets)
Flat-face quick-connect couplers, 1/2" body / 1/2" NPT. Standard on skid-steer and tractor remotes. Replace leaking or mismatched couplers to run more implements.
$88.11
Check Price at VEVOR
VEVOR 1/2" Hydraulic Hose, 50 ft (5000 PSI)
50-foot 1/2" hydraulic hose rated to 5000 PSI. Bulk length for building or replacing remote, loader, and top-and-tilt lines to your own fittings.
$71.90
Check Price at VEVOR
SMV Slow Moving Vehicle Sign
Bright orange retroreflective triangle. Required by law when operating any tractor or implement on public roads. Mounts to ROPS or rear frame.
View on Amazon
B'laster Penetrating Catalyst
11 oz spray. Breaks loose seized bolts, corroded fittings, and frozen hitch pins. Every tractor owner encounters a rusted fastener eventually.
View on Amazon
Universal Tractor Hydraulic Fluid
Full synthetic UTTO formula. Compatible with most compact and utility tractor transmissions, wet brakes, and hydraulic systems. Keeps linkages operating smoothly.
View on AmazonBest Sealants for Hydraulic Fittings
| Fitting Type | Recommended Sealant |
|---|---|
| NPT threads | Anaerobic hydraulic sealant or PTFE paste |
| JIC flare fittings | Anaerobic sealant only |
| O-ring boss (ORB) | No sealant (lubricate O-ring only) |
Application Tips
- Apply sealant to male threads only
- Start two threads back from the end to prevent sealant from entering the hydraulic circuit
- Allow proper cure time before pressurizing the system
- Avoid Teflon tape on JIC flare fittings and O-ring boss fittings (it can shred and contaminate the system)
Ready to Talk to a Dealer?
Dealer availability, financing, and parts support vary significantly by region. Compare quotes from local dealers before you buy.
Frequently Asked Questions
What are tractor hydraulic remotes?
How many rear remotes do I need?
What is the difference between rear remotes and third function?
Can I add rear remotes to any tractor?
What pressure should my rear remotes produce?
Why are my hydraulic remotes leaking down?
Do I need power beyond to install rear remotes?
Can I run multiple hydraulic cylinders at once?
Related Guides
Keep going, these guides pair well with what you just read.
Front Loader Attachments Guide
Grapples and hydraulic implements that rely on rear remotes and couplers.
Read guide3-Point Hitch Guide
How implements mount and connect at the rear of your tractor.
Read guideTractor Attachment Compatibility Guide
Check hydraulic, PTO, and hitch compatibility before you buy an implement.
Read guide