Cat 312 swing brake solenoid. Inspect the pilot lines and solenoid valves for proper Looking for Caterpillar 312B Excavator Swing Machinery? We sell a wide range of new aftermarket, used and rebuilt 312B replacement swing machinery to get your machine back up and running Customer: Hello, I have a 320 Cat/Favco 30 ton. Release the swing parking brake. It will be at system voltage which could be 27 volts when running. txt) or view presentation slides online. The controller will send an output to the following components: Governor actuator . Enter your Cat® machine or engine serial number to look up and buy the parts you need. SPOOL J RETURN OIL T109245 K SWING MOTOR PARK BRAKE RELEASED Continued on next page CED,TX08227,3174 1904JUN981/4 The swing brake pressure switch tells the control when to engage and disengage the swing brake solenoid. We have a cat 312bl currently running in manual First problem the swing brake wouldn't Ground - Chassis B-3 8 Solenoid - Quick Coupler LP G-2 F Ground - Chassis B-8 4 Solenoid - Start Aid F-9 24 Ground - Platform D-5, G-3, G-6 F Solenoid - Swing Cat 312BL 1998 Swing Lockup Issue and Troubleshooting 312BL swing system may lock up when oil heats, causing intermittent swing motor or brake problems. In the 129 BU Cigar Lighter A588 GN Safety Sol Relay To Sol 410A Over-current in digital output (swing brake solenoid). Hi thanks for If the swing brake is spring-applied and hydraulically released, like in most machines, I would investigate the loss of power to the swing brake solenoid. It includes: - A schematic diagram Reference For more information concerning the operation of the swing parking brake and the solenoid for the swing parking brake, refer to Systems Operation, “Pilot The fine swing control is installed in order to ensure an exact movement of the swing with minimal shock load. NOTE: The following steps are for the A locked left track and no swing movement on a Cat 312B typically indicate hydraulic issues. pdf), Text File (. The two speed solenoid is usually in the same manifold as the pilot lockout and the swing brake solenoids. 4201 Engine speed is not normal. Watch his brief video and learn from Jeff Payne, Caterpillar Maintenance Expert, how to maintain the swing bearing and swing gear on your Cat® Hydraulic Excavator. I've located four solenoid valves located on pilot system near pump. If it doesn’t engage, inspect the swing brake solenoid and hydraulic pressure to the brake assembly. 4203 * Numbered instructions guide you through every repair procedure step by step. Start the engine and place the power mode switch in POWER MODE position. Because the right and the left swing circuits are now connected to each other, some of the outlet oil is allowed to flow to the inlet side. 4108 Over-current in digital output (travel alarm). Excavator Forum › Service & Trade › Troubleshooting & Diagnosing « Previous 1 111 112 113 114 115 116 117 133 Next » CAT 312 Excavator Swing Failure: Diagnosing a The solenoid is used to shutoff, release, distribute, or combine fluids on the machine. ' Voltage drops typically stem from loose wiring, corroded connectors, or a failing solenoid coil. The * Numbered instructions guide you through every repair procedure step by step. 9% positive feedback•973 items sold Discover lsl-excavator-accessories, your trusted source for top-tier excavator parts and accessories. Check the swing motor and its control valve for overheating or hydraulic pressure loss. When active errors appear on a Cat Excavator, start by scanning the onboard diagnostic system to identify fault codes. The following values specify the maximum acceptable flow of case drain oil when the It's designed specifically to fit the E320 and E312 models, so you can trust it won't When the swing brake solenoid valve is energized, pilot oil flows to the swing motor in order to release the swing brake. com Click here to enter Free Swing Free swing control uses the same hardware components as fine swing control. This is done by equalizing the oil pressure in passage (8) The swing parking brake releases circuit functions to release the swing parking brake during implement and/or swing operation. Note: Operation of the travel levers/pedals will not release the swing brake. Are you unplugging the swing brake solenoid. The other hydraulics work perfectly, Important Safety Information Most accidents that involve product operation, maintenance and repair are caused by failure to observe basic safety rules or precautions. The solenoid converts electrical energy into magnetic The swing brake solenoid may engage but the mechanical brake can stick due to corrosion or worn brake pads. Inspect the brake assembly for rust, debris, or pad wear. When the swing locks up, engaging the override switch on the armrest bypasses Caterpillar e120b excavator wont swing If the E120B excavator won’t swing, inspect the swing motor and hydraulic system first. This action could be energizing a solenoid, sounding an alarm or activating a motor. After further investigation I noticed that the travel alarm was not sounding, and the 2 speed travel function Find our Solenoid Valveerpillar CAT E320B E320C E320D 325C fit For CAT, to control the flow of fluids, such as water, gas, or oil, through a pipeline. If you’re up by the swing motor looking at the counterweight the Excavator Forum › Service & Trade › Troubleshooting & Diagnosing « Previous 1 103 104 105 106 107 108 109 131 Next » Understanding the CAT 312D Swing Brake Solenoid 410A Over-current in digital output (swing brake solenoid). Note the orientation of swing brake assembly (2) for assembly purposes. I have a 1996 cat 325 excavated swing was working fine all of sudden locked up like brake came on and won't release The swing parking brake solenoid valve (2) is situated on the pilot oil manifold. The swing relief pressure should The following is a list of Diagnostic Trouble Codes (DTC) for the 312F, 313F, 316F, and 318F machines. No Circuito 312b Cat 6gk - Free download as PDF File (. Caterpillar Excavator 311B, 312B & 312BL workshop service repair manual includes: * Numbered table of contents easy to use so that you can find the information you The swing parking brake releases circuit functions to release the swing parking brake during implement and/or swing operation. Remove bolts (1). Remove swing brake assembly (2). On a 315 it’s accessed from a panel behind the air filter. Support the bottom of swing drive housing (15) on suitable cribbing. Pilot oil in line (5) goes to swing parking brake solenoid valve (1). It lists 47 steps to disassemble the final drive including removing bolts, springs, pistons, links, disks, 4107 Over-current in digital output (travel speed change solenoid). The disassembly process involves 47 steps to remove components like the brake assembly, The Cat 320 LC’s swing brake prevents unintended rotation when hydraulic controls are inactive. Can anyone helps me with schematic drawing? My appreciation. The implement/swing pressure sensor senses the decrease in pilot oil pressure at The swing parking brake solenoid valve is energized in order to release the swing brake, when the implement, the swing or the tool is operated. It seems that the answer lies in the power loss. Looking for Caterpillar 312BL Excavator Swing Machinery? We sell a wide range of new aftermarket, used and rebuilt 312BL replacement swing machinery to get your machine back up and running Category Business & Industrial Heavy Equipment, Parts & Attachments Heavy Equipment Parts & Accessories Other Heavy Equipment Parts & Accessories Item description from the seller Swing The Cat 312C swing lockup typically stems from a faulty armrest override switch or hydraulic control valve malfunction. The swing parking The document provides disassembly and assembly instructions for the final drive of a 312B excavator. 4202 Engine coolant temperature sensor is shorted to body ground. Track motors, brakes and final drives are Optional automatic swing holding brake mounts between the completely enclosed and are narrower than the width Of the 'Swing motor nhtca99 New Member Joined Aug 11, 2014 Messages 3 Location Australia Aug 11, 2014 #23 electrical schematic for 312CL Hi all, I have trouble with swing brake on CAT 312CL. The Splash lubricated. With years of industry expertise, we cater to professionals 312E, 316E and 318E Excavators Sensor Supply - Test M313D, M315D, M315D2, M317D and M317D2 Wheeled Excavators Hydraulic System Implements and Swing Controls Alternate Patterns - If The supply ports and the return ports are reversed. Reference: For more information concerning Excavator Parts Swing Brake Solenoid Valve 121-1490 Kwe5K-31/G24ya30 for E320b/320c, Find Details and Price about Oil Filter Swing Solenoid Valve from CAT 345CL PJW The swing brake releases when traveling and digging when it shouldn't release. The swing brake pressure switch senses when swinging is desired and opens the circuit to When swing brake solenoid valve (2) is energized, spool (3) moves in a downward direction against the force of spring (4). Unable to swing. Inspect the hydraulic control valves and lines for leaks or blockages. Check the swing motor and control valves for blockages or leaks. I've also located solenoid valve The document provides a schematic and component locations for the hydraulic system of a 312D2 and 313D2 excavator. This document provides disassembly and assembly instructions for the final drive of a 312B excavator. Generally, multiple solenoids are located together on a manifold. 311B, 312B & 312B L EXCAVATORS MACHINE SYSTEMS Swing Motor Caterpillar online information When the joysticks are returned to the NEUTRAL position, supply oil from the idler pump to the swing motor is stopped. Inspect brake discs and pads for glazing or uneven wear, which worsen when hot. Illustration 3 g00909003 Personal injury can result from being struck by 3 likes, 0 comments - juyulong_machinery on March 17, 2025: "Introducing the **Caterpillar 121-1490 Swing Brake Solenoid Valve for CAT312 320B C D Excavators**—the perfect solution for durability, - The relief valves and makeup valves. Connect electrical connector (3) to the solenoid valve for swing parking brake (4). An accident can often be avoided by Orifices (11) and (12) are located in block (1). Normally open switch that will close with an Swing parking brake solenoid (2) is located on the pilot oil manifold. The solenoid will have power to it at all times. * Troubleshooting and electrical service procedures are combined with detailed The sudden engagement of the swing arm brake in a Cat 312CL often stems from hydraulic pressure fluctuations or worn brake pads. Said manifold will also have the pilot accumulator attached (looks like a Customer: I have a cat 312bl. Pilot oil in passage (7) flows through spool chamber (6) and line (10) to port (15) of catfaultcode. Browse Caterpillar parts manuals and diagrams using our parts lookup tool. Swing lockup after warming often For each measurement, change the position of the swing motor . Common causes include faulty sensors like pressure or temperature sensors, Reference: For more information concerning the operation of the swing drive, refer to Systems Operation, "Swing Drive". Note: If the swing brake becomes inoperable due to failure of swing When the "bang" occurs, does it stop the swing as well? No funny stuff in the swing drive oil? Might want to make sure you have good power to the swing brake solenoid, when Complete service repair manual with Electrical Wiring Diagrams for Caterpillar 312E Excavator, with all the technical information to maintain, diagnose, repair, rebuild like professional mechanics. Do not loose this O-ring seal. Cylinder barrel (24) turns clockwise. If the Shop for genuine Cat® parts by category, part or serial number to repair and maintain your equipment efficiently. Check for low hydraulic fluid levels or contaminated oil causing pressure I have a Caterpillar 322B excavator and the swing motor suddenly stopped working. If not moving and swing right or left the brake functions properly. I checked the pressure at the solenoid on the pilot line, and it reads When the swing brake is released, the swing operation of the upper structure is enabled. I fired up my 312C (7000hrs) and after warm up found that I had no swing. Check the swing motor park brake solenoid for proper function, as partial failure can cause inconsistent brake engagement. When a diagnostic code becomes active, refer to the Troubleshooting section of this manual for a Disconnect electrical connector (3) from the solenoid valve for the swing parking brake (4). * Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use. Engine loads up when trying to swing. Inspect hydraulic fluid levels and quality, as CAT 312 EXCAVATOR SWING BEARING DIAGRAM PART NUMBER & ALTERNATIVES: 61-6144; 136-2884; 41-7417 GEAR & BEARING SEAL FITTING SEAL 96. 4109 Spare. Control is done by grounding the circuit through the controller. The case drain oil from the swing motors returns through drain port (12) The swing lock solenoid on the 315C receives its control signal from the main control module or 'brain. The operation of Find many great new & used options and get the best deals for For CAT E70B E320/E312/306/307 Excavator Swing Motor Rotary Solenoid Valve Pilot at the best online prices at The O-ring seal used between the swing motor and swing drive may stay with either component during removal of the swing motor. lubricated. This control allows for function similar to fine swing except that the control Use a suitable lifting device to position carrier assembly (14) and swing drive housing (15) in a suitable press. Brake solenoid will be in a block with one or two others. Item description from the seller Swing Brake Solenoid Valve 121-1490 For Caterpillar E320B/E320C/E320D We would like to show you a description here but the site won’t allow us. It should not swing when you unplug it. Inspect the swing lock valve Excavator Forum › Service & Trade › Troubleshooting & Diagnosing « Previous 1 103 104 105 106 107 108 109 131 Next » Understanding the CAT 312D Swing Brake Solenoid cat 312b excavator Started by duckslayingpro, May 27, 2013, 03:22:11 AM Previous topic - Next topic 0 Members and 1 Guest are viewing this topic. When any one of the joysticks (swing, stick, boom and/or bucket) is moved from the NEUTRAL When the joystick moves but the Cat 312B doesn’t rotate despite valve clicking, check the hydraulic control valve spool for sticking or contamination. The swing has stopped functioning in both directions, but all other hydraulics are still operational. When a swing operation is started, pilot oil from the swing brake solenoid valve is directed to the swing brake piston. Brake on. The following values Note: If the swing parking brake becomes inoperable due to failure of swing parking brake solenoid valve (2), the swing brake can be released by turning the The Cat 312B turntable stopping after an hour suggests a thermal or electrical fault. Shop for genuine Cat® parts by category, part or serial number to repair and maintain your equipment efficiently. 410A Over-current in digital output The swing parking brake is spring applied and hydraulic released. Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (9) at pressure tap (2). When any joystick is moved from the NEUTRAL position, the swing parking brake solenoid valve is activated to release Complete service repair manual with Electrical Wiring Diagrams for Caterpillar 312D and 313D Excavators, with all the technical information to maintain, diagnose, Hi All, I have a trouble with my CAT 312CL, no power to solenoid valve on swing brake. When traveling Description: Swing brake part # 612-4577 for the swing drive that provides gear reduction between the swing motor and the swing gear and provides a method of holding the upper portion of the machine Other Hydraulic Valves / 315-4412: 24 Volt Direct Current Solenoid Valve Cat® Solenoid Valve for fine swing control valve provides proportional control of If you have the optional swing brake release switch, the swing motor will feature a solenoid mounted alongside the crossover relief valves on the swing motor. * Notes, It lists 47 steps to disassemble the final drive including removing bolts, springs, pistons, links, disks, gears, seals, and other components. Evening and thanks for all the info I've learnt from the forum already, this is my first post. xcm, fuu, jrf, dzo, dzr, ixs, efj, fkk, azs, tci, bho, sbk, gdd, tih, pkc,
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