Hitachi ZX670LC-6, ZX690LCR-6 and ZX690LCH-6 Excavator Service Repair Manual Workshop Guide

The manual is applicable for the Hitachi Excavator Model: ZX670LC-6 ZX690LCR-6 ZX690LCH-6 Format: PDF Language: English Service Repair Manual consists of the following: See description for full details Description Hitachi ZX670LC-6, ZX690LCR-6 and ZX690LCH-6 Excavator Manual The manual is applicable for the Hitachi Excavator Model: ZX670LC-6 ZX690LCR-6 ZX690LCH-6 Format: PDF Language: English Service Manual consists of the following: For Model ZX670LC-6, ZX690LCR-6 and ZX690LCH-6 as mentioned above: Service Manual (Troubleshooting) Vol. No. TOJBK40-EN : 490 Pages Service Manual (Operation) Vol. No. TTJBK40-EN : 455 Pages Workshop Manual Vol. No. WJBK40-EN : 769 Pages Circuit diagram: 35 Pages SI Units (International System of Units) are used in those manual. Manual guide composition Hitachi ZX670LC-6, ZX690LCR-6 and ZX690LCH-6 service manual consists of the Operating, Troubleshooting and the Workshop Manual. Information included in the Service Manual: Technical information needed for redelivery and delivery, operation and activation of all devices and systems, operational performance tests, and troubleshooting procedures. Information included in the Workshop Manual: Technical information needed for maintenance and repair of the machine, tools and devices needed for maintenance and repair, maintenance standards, and removal / installation and assemble / disassemble procedures. To avoid injury and damage refer to the service manual and be sure to use appropriate lifting techniques and equipment when lifting heavy parts. A ZAXIS hallmark industry-leading hydraulic technologies, and performance no other can beat. New ZAXIS provides reliable solutions: impressive fuel economy, swift front movements, and easy operation. You'll also find Hitachi technological prowess and expertise, such as the optimized hydraulic system and engine.New ZAXIS features the key benefits of high quality, low fuel consumption, and high durability, all of which serve to ensure low running costs.New ZAXIS, which is empowered by comprehensive evolution, will realize customers visions and dreams, and pioneer your colorful future Bypass Shut-Out Valve Manual Instructions Extract: Bypass shut-out valves (9, 17) are provided in the down stream side of neutral circuit (pump 1) (15) and neutral circuit (pump 2) (16). Bypass shut-out valve (9) blocks neutral circuit (pump 1) (15), combines pressure oil from pump 1 (10) with pump 2 (11), increases oil flow rate flowing into attachment (1) to increase attachment (1) operation speed. Bypass shut-out valve (17) blocks neutral circuit (pump 2) (16), combines pressure oil from pump 1 (10) with pump 2 (11), increases oil flow rate flowing into the bucket cylinder to increase the bucket operation speed. Bucket Flow Combiner Circuit 1. Pilot pressure (d) from 4-spool solenoid valve unit (SF) (19) shifts bypass shut-out valve (17) of neutral circuit (pump 2) (16). 2. As neutral circuit (pump 2) (16) is blocked, pressure oil from pump 2 (11) is combined with pressure oil from pump 1 (10). The combined oil is supplied to bucket spool (18). 3. Consequently, operation speed of the bucket is increased