992K Wheel Loader Electrohydraulic System Caterpillar


Main Hydraulic System

Usage:

992K H4C



图 1g01458167

主液压系统

(1) 倾斜油缸

(2) 再生阀

(3) 提升油缸

(7) 梭阀

(11) 主控制阀(左)

(14) 主控制阀(右)

(24) 机具泵(中)

(26) 机具泵(右)

(27) 液压油箱




图 2g01454451

机器前部

(1) 倾斜油缸

(3) 提升油缸




图 3g01439994



图 4g01438796

主控制阀(左)

(11) 可变排量活塞泵(中)主控制阀(左)

(28) 可变排量活塞泵(中)安全阀

(29) 歧管




图 5g01439996



图 6g01438801

主控制阀(右)

(14) 可变排量活塞泵(右)主控制阀

(29) 歧管

(30) 可变排量活塞泵(右)安全阀

启动提升操纵杆时,自机具控制阀流出的油导入提升油缸 (3) 。 启动倾斜操纵杆时,自主控制阀流出的油导入倾斜油缸 (1) 。

主控制阀包括机具控制阀 (11) 和 (14) 及歧管 (29) ,歧管将两个机具控制阀分开。 歧管有三个油道:自两个主控制阀返回液压油箱的管路, 自中心可变排量活塞泵至左机具控制阀的供油管路 和 自右可变排量活塞泵至右机具控制阀的供油管路。

主控制阀(左)包括以下部件:梭阀, 主泵安全阀, 缸盖端管路安全阀(提升回路和倾斜回路), 连杆端管路安全阀(提升回路和倾斜回路), 提升主控制阀杆, 倾斜主控制阀杆, 先导控制执行器, 电磁阀(先导控制执行器), 减压阀 和 浮动阀。

右机具控制阀包括以下部件:主泵安全阀, 盖端管路安全阀(倾斜回路), 连杆端管路安全阀(倾斜回路), 提升主控制阀杆, 倾斜主控制阀杆, 先导控制执行器 和 电磁阀(先导控制执行器)浮动阀。

电磁阀(液压锁定)位于歧管 (29) 上。




图 7g01438895

泵室

(24) 机具泵(中)

(26) 机具泵(右)

泵室在驾驶室后面平台里的检修门下面。

自机具泵(中) (24) 流出的机油流过主控制阀左侧。 自机具泵(右) (26) 流出的机油流过主控制阀右侧。 机油流过主控制阀后,机油流量会合起来。

Caterpillar Information System:

993K Wheel Loader Braking System Pressure Sensor (Axle Brake Oil)
992K Wheel Loader Electrohydraulic System Relief Valve (Implement Pilot)
992K Wheel Loader Electrohydraulic System Tilt Cylinder
992K Wheel Loader and 854K Wheel Dozer Power Train Final Drive, Brake and Wheel
Bench Test Procedure for a 990, 990 Series II, 990H Wheel Loader and a 844, 844H Wheel Dozer Torque Converter{3101} Bench Test Procedure for a 990, 990 Series II, 990H Wheel Loader and a 844, 844H Wheel Dozer Torque Converter{3101}
993K Wheel Loader Power Train Electronic Control Module
993K Wheel Loader Power Train General Information
2008/09/29 An Improved Three-Piece Oil Pan Gasket is Now Used {1302, 7555}
2008/05/12 Wear that is Acceptable in Specific Gear Pumps {4007, 5073, 5073, 7516}
854K Wheel Dozer and 992K Wheel Loader Power Train Electronic Control Module (ECM) - Replace
992K Wheel Loader and 854K Wheel Dozer Power Train Transmission, Input Transfer Gears and Output Transfer Gears - Install
2008/02/11 Update on the Factory Password System {1901, 7620}
992K Wheel Loader and 854K Wheel Dozer Braking System Brake Accumulator
992K Wheel Loader and 854K Wheel Dozer Power Train Transmission from Input Transfer Gears and Output Transfer Gears - Separate
854K Wheel Dozer and 992K Wheel Loader Oil Cooler Core (Transmission) - Install
854K Wheel Dozer and 992K Wheel Loader Oil Cooler Core (Engine) - Remove
854K Wheel Dozer and 992K Wheel Loader Oil Cooler Core (Engine) - Install
992K Wheel Loader and 854K Wheel Dozer Power Train Transmission to Input Transfer Gears and Output Transfer Gears - Connect
854K Wheel Dozer and 992K Wheel Loader Battery - Remove and Install
993K Wheel Loader Power Train Input Transfer Gears
994F Wheel Loader Power Train Differential and Bevel Gear (Rear) - Install
994F Wheel Loader Power Train Differential and Bevel Gear (Front) - Install
844K and 854K Wheel Dozers and 990K, 992K, 993K, 994F and 994H Wheel Loaders Powered Access Stairway Connector Locations
992K Wheel Loader and 854K Wheel Dozer Power Train Output Transfer Gears - Disassemble
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