822778A 3 Mariner DOWN PRESSURE KIT


822778A 3 DOWN PRESSURE KIT Mariner 7031203GD, 7031207CD, 7031207LF, 7031312TB, 7041203GB, 70432037D, 7043213HD, 7043213TD, 7043302TD, 7043412TB, 7043412TD, 7050312TB, 7050312UB, 7050412TB, 7050412TD, 7050412UB, 7055207GD, 7055207HB, 7055207TF, 7075217CD, 7075217HD, 7075217TD, 7075217U DOWN
822778A 3 DOWN PRESSURE KIT Mariner
Rating:
63

Buy DOWN PRESSURE KIT 822778A 3 Mariner genuine, new aftermarket parts with delivery
Number on catalog scheme: -
 

Mariner entire parts catalog list:

7031203GD 1998,1999
7031207CD 1994,1995,1996,1997,1998
7031207LF 2002,2003
7031312TB 2005,2006
7041203GB 1998,1999,2000,2001,2002,2003,2004
70432037D 1997,1998
7043213HD 1999,2000,2001,2002,2003,2004
7043213TD 2005
7043302TD 2005
7043412TB 2005,2006
7043412TD 2005
7050312TB 2005
7050312UB 2006
7050412TB 2005
7050412TD 2005
7050412UB 2006
7055207GD 1998
7055207HB 1999,2000,2001,2002,2003,2004
7055207TF 2005,2006
7075217CD 1994,1995,1996,1997,1998
7075217HD 1999,2000,2001,2002,2003,2004
7075217TD 2005
7075217UD 2006
70752L7TF 2005
70752L7UF 2006
7075317TB 2005
7075317UB 2006
7075412TB 2005
7075412UB 2006
7075412UY 2006
7090412TB 2005
7090412TD 2005
7090412TY 2005
7090412UB 2006
7090412UY 2006
7100412CD 1994,1995,1996,1997,1998
7100412HB 1999,2000,2001,2002,2003,2004
7115412TB 2005,2006
7135V13ID 2006,2007
7135V13UB 2006
7135V13ZB 2006
7F25201GD 1998
7F25203JB 2000,2001
7F25203LB 2002,2003,2004,2005
7F30203HD 1999,2000,2001
7F30203LB 2002,2003,2004,2005
7F40203UD 2006
7F40203ZZ 2006
7F40213UZ 2006
7F40452KD 2001
7F40452LB 2002
7F41452KB 2001,2002
7F41452KD 2001
7F50352HD 1999,2000
7F50412DD 1995,1996,1997,1998

Information:

Low Fuel Pressure
Low fuel pressure can cause low power. Low fuel pressure can also cause cavitation of the fuel which can damage the fuel injectors. The following conditions can cause low fuel pressure:
Plugged fuel filters
Debris in the check valves for the fuel priming pump (if equipped)
Sticking or worn fuel pressure regulating valve in the fuel transfer pump
Severe wear on return fuel pressure regulating valve at the rear of the cylinder head
Worn gears in the fuel transfer pump
Pinched fuel lines or undersized fuel lines
Old fuel lines that have a reduced interior diameter that was caused by swelling
Fuel lines with deteriorating interior surfaces
Pinched fuel line fittings or undersized fuel line fittings
Debris in the fuel tank, fuel lines, or fuel system components that create restrictionsHigh Fuel Pressure
Excessive fuel pressure can cause fuel filter gaskets to rupture. The following conditions can cause high fuel pressure:
Plugged orifices in the fuel pressure regulating valve
Stuck fuel pressure regulating valve in the fuel transfer pump
Pinched fuel return lineChecking Fuel Pressure
Illustration 1 g00293196
1U-5470 Engine Pressure Group Refer to Special Instruction, SEHS8907, "Using The 1U-5470 Engine Pressure Group".
Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. Clean up fuel spills immediately.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Use the following procedure to measure the fuel pressure after the secondary filter:Note: Fuel pressure readings near the fuel supply manifold have pressure spikes. The pressure spikes are caused by excess fuel that is returning to the fuel system from the injectors. Excessive needle movement at the gauge may be present. Connect the gauge with a section of suitable hose. The air in the hose absorbs the spikes. This gives an average reading and a steady needle. Keep the gauge above the measuring point.
Illustration 2 g00945275
(1) PlugInstall the 1U-5470 Engine Pressure Group into port (1) .During both normal operating conditions and load conditions, the fuel pressure should register the following range:
455 to 579 kPa (66 to 84 psi)At low idle, the fuel pressure at the fuel filter's inlet should be at the following amount:
400 to 434 kPa (58 to 63 psi)The fuel pressure to the fuel gallery should be the same amount, if you subtract the change in pressure (delta P) across the filter. With a new filter, the pressure drop across the fuel filter typically registers the following amount:
35 kPa (5 psi)As deposits collect on a fuel filter, the pressure differential will increase. Engine misfire may occur if the fuel pressure in the fuel gallery decreases to approximately 69 kPa (10 psi).The fuel pressure regulator valve is mounted at the fuel return port at the rear of the fuel gallery in the cylinder head. The fuel pressure regulating valve maintains fuel pressure at low engine rpm. The regulating valve also contains a spring loaded check valve. The spring loaded check valve prevents the fuel from draining from the fuel gallery back to the fuel tank after engine shutdown.Unit Injector Hydraulic Pump (Test)
Injection Actuation Pressure (Test)
The test for injection actuation pressure is used in order to check for the following conditions:
The unit injector hydraulic pump is producing maximum pressure.
The pump pressure regulator is working properly.
The unit injector hydraulic pump is worn.
System leaksThe Caterpillar Electronic Technician (Cat ET) is used to perform this test.Dead Head Test for the Unit Injector Hydraulic Pump
The unit injector hydraulic pump dead head test is used to verify that the following conditions exist:
The injection actuation pressure circuit is working.
The unit injector hydraulic pump is working properly.
Illustration 3 g00749695
High pressure line
Table 1
Required Tools    
Part Number     Part Name     Quantity    
125-2580     Tool Group For HEUI     1    To check the pressure for the unit injector hydraulic pump, remove the pump outlet line (1) from the pump. Install the appropriate gauge from the 125-2580 Tool Group For HEUI . The gauge to use should have a range that would include 34 MPa (5000 psi).Note: Be sure to install a cap or plug the fitting that goes into the high pressure oil gallery.Crank the engine for approximately 3 seconds in order to get the maximum pressure.If the recorded pressure is less than 26.5 MPa (3850 psi), the pump should be replaced.If the recorded pressure is equal


Back to top