2001 dodge ram 2500 4x4 vacuum
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Filed Under (Jeep) by admin on 18-11-2010
1. Disconnect vacuum hose at speed control servo and install a vacuum gauge into the disconnected hose. 2. Start engine and observe gauge at idle. Vacuum gauge should read at least ten inches of mercury. 3. If vacuum is less than ten inches of mercury, determine source of leak. Check vacuum line to engine for leaks. Also check actual engine intake manifold vacuum. If manifold vacuum does not meet this requirement, check for poor engine performance and repair as necessary. 4. If vacuum line to engine is not leaking, check for leak at vacuum reservoir. To locate and gain access to reservoir, refer to Vacuum Reservoir REMOVAL /INSTALLATION . Disconnect vacuum line at reservoir and connect a hand-operated vacuum pump to reservoir fitting. Apply vacuum. Reservoir vacuum should not bleed off. If vacuum is being lost, replace reservoir. 5. Verify operation of one-way check valve and check it for leaks. a. Locate one-way check valve. The valve is located in vacuum line between vacuum reservoir and engine vacuum source. Disconnect vacuum hoses (lines) at each end of valve. b. Connect a hand-operated vacuum pump to reservoir end of check valve. Apply vacuum. Vacuum should not bleed off. If vacuum is being lost, replace one-way check valve. c. Connect a hand-operated vacuum pump to vacuum source end of check valve. Apply vacuum. Vacuum should flow through valve. If vacuum is not flowing, replace one-way check valve. Seal the fitting at opposite end of valve with a finger and apply vacuum. If vacuum will not hold, diaphragm within check valve has ruptured. Replace valve.
Filed Under (Dodge) by admin on 05-07-2010
NOTE: The compressor clutch assembly can be serviced with the refrigerant system fully-charged. Typical A/C compressor shown in illustrations. 1. Disconnect and isolate the negative battery cable. 2. Remove the accessory drive belt. 3. Disconnect the engine wire harness from the compressor clutch field coil connector (1) located on the top of the A/C compressor (5). 4. Remove the bolts that secure the A/C compressor to the engine and support the A/C compressor. 5. Carefully remove the compressor clutch field coil connector and wire lead from the connector bracket (2). 6. Remove the compressor shaft bolt (3). A band-type oil filter wrench or a strap wrench may be used to hold the clutch plate (4) from rotating during bolt removal. CAUTION: Do not pry between the clutch plate and the pulley and bearing assembly to remove the clutch plate from the compressor shaft as this may damage the clutch plate. NOTE: Use care not to lose any clutch shim(s) during removal of the clutch plate, as they may be reused during the clutch plate installation process. 7. Tap the clutch plate (2) lightly with a plastic mallet to release it from the splines on the compressor shaft (1) and remove the clutch plate and shim(s) (3). 8. Using snap ring pliers (2), remove the snap ring (1) that secures the pulley and bearing assembly (3) to the front of the A/C compressor and remove the pulley and bearing assembly. 9. Using snap ring pliers (Special Tool C-4574 or equivalent) (1), remove the snap ring (4) that secures the compressor clutch field coil (2) to the front of the A/C compressor (3) and remove the field coil. INSTALLATION NOTE: Typical A/C compressor shown in illustrations.
Filed Under (Dodge) by admin on 06-01-2011
SUBJECT: Cummins 6.7L Diesel Turbocharger – Necessary System Inspections And Tests OVERVIEW: This bulletin involves the inspection and/or test of the Diesel Turbocharger and related emissions system components. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Additional diagnosis may reveal that the MIL is due to Diagnostic Trouble Code (DTC): P2262 – Turbocharger Boost Pressure Not Detected – Mechanical. DIAGNOSIS: 1. Connect the StarSCAN® to the Diagnostic Link Connector (DLC). 2. Set the parking brake. Start the vehicle engine. 3. From the “Home” screen on the StarSCAN® select: a. “ECU View” button. b. “PCM Powertrain Control Module” button. c. “View DTC’s” button. 4. Record all Diagnostic Trouble Codes (DTC’s) that are present in the PCM. NOTE: It is IMPORTANT to record (capture) all DTC’s present in the PCM prior to proceeding further with this diagnosis. Procedures later may cause all DTC’s to be erased. 5. Is DTC P1451, P2463, or P242F present in the PCM? a. If YES >>> STOP. Refer to Service Bulletin (SB) 11-002-07 (or later bulletin) to address this concern and before proceeding further with this Service Bulletin. In addition to other repairs, SB 11-002-07 may direct the technician to perform a thorough cleaning of Engine and Exhaust Aftertreatment System components. Contact STAR if additional assistance is required. Proceed to the next step ONLY after SB 11-002-07 has been reviewed and/or performed. b. If NO >>> then proceed to the next step. 6. Verify that the PCM is at the latest application software level. 7. Is the PCM at the latest application software level? a. If YES >>> then proceed to the next step. b. If NO >>> then reprogram the PCM to the latest software level. Refer to SB 18-013-08 (or later bulletin). Proceed to the next step ONLY after the PCM has been reprogrammed to the latest software level. 8. Was DTC P2262 present in the PCM?
Filed Under (Dodge) by admin on 04-06-2010
SUBJECT: Front End Shimmy On 4×4 Vehicles When Traveling Over Rough Surfaces In The Road OVERVIEW: This bulletin involves verifying the condition of the vehicle front suspension and steering components, and adjusting the front tire pressure. MODELS: 2003 – 2007 (DR/DH/D1/DC) Ram Truck (2500/3500) NOTE: This bulletin applies to four wheel drive (4×4) 2500 and 3500 model vehicles. SYMPTOM/CONDITION: The customer may experience a self sustaining vibration (shimmy) felt in the front end of the vehicle after striking a bump or pothole. DIAGNOSIS: If the customer experiences the above condition perform the Repair Procedure.
Filed Under (Chevrolet) by admin on 19-10-2010
1. Disconnect the brake booster vacuum check valve (1) from the brake booster. 2. If the vacuum check valve (1) needs to be separated from the vacuum hose (3), release and reposition the clamp (2) on the vacuum hose (3) and remove the check valve (1) from the hose (3). 3. If replacing the vacuum check valve (1), remove the grommet (4) from the brake booster and discard the grommet. 4. If removing the vacuum hose (2), take note of the vacuum hose routing then disconnect from the engine intake manifold connection (3) by releasing tension on the vacuum hose clamp (1) and sliding the vacuum hose (2) off the intake manifold connection (3). Installation Procedure Important: A small amount of denatured alcohol can be used as an assembly aid when installing the vacuum check valve and/or grommet. Do NOT use soap. 1. If the vacuum hose (2) was removed, install the vacuum hose into position on the vehicle as noted prior to removal, then connect the vacuum hose (2) to the engine intake manifold connection (3) and secure with the vacuum hose clamp (1). 2. If the vacuum check valve (1) is being replaced, install a NEW grommet (4) to the brake booster. 3. If the vacuum check valve (1) was separated from the vacuum hose (3), install the check valve (1) to the vacuum hose (3). Install and secure the clamp (2) into position on the hose (3). 4. Connect the brake booster vacuum check valve (1) to the brake booster.