Vacuum Pump ME017287 For Mitsubishi Canter FE439 FE449 FE639 4D34 4D33 Engine

Vacuum Pump ME017287 For Mitsubishi Canter FE439 FE449 FE639 4D34 4D33 Engine

1. Quick Notice

Confirm your engine code (4D33 or 4D34) and chassis model (FE439, FE449, or FE639) before ordering ME017287. This is a vacuum pump, not a power steering pump or fuel lift pump. Verify mounting flange pattern and drive type (gear or belt). Professional installation recommended.

2. Description

The ME017287 vacuum pump generates negative pressure for brake booster and vacuum-assisted systems on Mitsubishi Canter trucks. Mounted to the engine block or timing case, this pump is driven by the camshaft or fuel injection pump gear. Constructed from aluminum housing with carbon or vane-type rotating internals. The pump draws air from the brake booster, maintaining vacuum reserve in the storage tank. Fits Canter FE439, FE449, and FE639 chassis equipped with 4D33 or 4D34 diesel engines. Common failure modes include worn internal vanes causing reduced vacuum, oil leakage from the shaft seal, seized bearings from lubrication loss, and cracked housing from overtightened mounting bolts. Replacement restores brake assist power and vacuum-dependent functions such as EGR valve actuation on applicable models.

3. Parameters Table

4. Custom Content

Vacuum Testing Procedure: With engine at idle, disconnect the vacuum line from the pump. Attach a vacuum gauge directly to the pump outlet. Reading should reach 25 inHg within 10 seconds. Fluctuating readings indicate worn vanes or internal air leakage. Readings below 20 inHg at any engine speed indicate pump replacement is required.

Oil Supply Verification: This pump requires engine oil for lubrication. Locate the oil supply line or passage feeding the pump. Before installing a new pump, verify oil flow by cranking the engine briefly with the line disconnected. Low or no oil flow destroys the new pump within minutes. Clean any blocked passages.

Mounting Gasket: A new gasket is required for installation. The gasket thickness affects gear backlash on gear-driven pumps. Use the specified gasket from the parts catalog. Do not substitute with liquid sealant or homemade gaskets of incorrect thickness.

Break-In Period: A new vacuum pump requires 15 to 30 minutes of engine operation to seat the vanes against the housing. During this period, vacuum output may be lower than specification. After break-in, output should stabilize at full specification. Do not test maximum braking effort during break-in.

5. FAQ 

Q1: What symptoms indicate a failing vacuum pump on a Canter?
A1: Hard brake pedal (reduced power assist), hissing sound from the pump area, oil dripping from the pump housing, or vacuum gauge reading below 20 inHg. Brake booster reserve depletes quickly after engine shutdown.

Q2: Does ME017287 fit both 4D33 and 4D34 engines?
A2: Yes. This vacuum pump is specified for both the 4D33 and 4D34 engines in Canter FE439, FE449, and FE639 chassis. No modification is required.

Q3: Is this pump driven by gear or belt?
A3: Gear-driven from the camshaft or fuel injection pump gear. No belt is involved. Inspect the drive gear teeth on the old pump before ordering replacement.

Q4: Can I drive the truck with a failed vacuum pump?
A4: Driving is possible but the brake pedal will feel very hard. Stopping distances increase significantly. Do not drive at highway speeds. Repair immediately. Vacuum-assisted brake systems require proper pump function for safe operation.

Q5: What causes oil leakage from the vacuum pump?
A5: The internal shaft seal hardens and cracks with age and heat. Engine oil then leaks past the seal and drips from the pump housing. Some leakage also indicates worn housing bore or scored shaft surface.

Q6: How do I prime a new vacuum pump?
A6: No priming is required. Crank the engine without starting for 5 seconds to allow oil to reach the pump. Start the engine and allow idle operation for one minute before driving.

Q7: Will this pump fit my Canter with a different chassis code?
A7: The primary fitment is FE439, FE449, and FE639. Other Canter chassis such as FE429 or FE659 may use a different pump with different mounting pattern. Compare your original pump shape and bolt hole positions.

Q8: What is the expected service life of this vacuum pump?
A8: Original equipment pumps typically last 150,000 to 200,000 kilometers. Shorter life occurs in dusty environments or with infrequent oil changes. Vane wear accelerates when engine oil is contaminated with soot.

Q9: Does this pump require a separate vacuum reservoir tank?
A9: The pump supplies vacuum to the brake booster and an external storage tank. The tank is a separate component not included with ME017287. Check the tank for cracks or leaks if brake assist feels weak despite a new pump.

Q10: Can I rebuild the pump instead of replacing it?
A10: Rebuild kits containing vanes, seals, and gaskets are available for some vacuum pumps. Check availability for ME017287 specifically. Housing wear often makes rebuilding ineffective. Replacement is recommended for most failures.