Danfoss Series 45 Service Manual

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Danfoss Series 45 Service Manual Manual pdf 32 page image

2. Inspect the springs and spring guides for wear or damage; replace as necessary.3. Carefully inspect the spools. Ensure the sealing lands are free of nicks and scratches. Check the endsthat contact the spring guides for wear. Replace spools as necessary.4. Inspect the control housing for damage. Check the spool bores for excessive wear.5. Clean all parts and lubricate spools, springs, guides and new O-rings with clean hydraulic fluid.Reassembly1. Install the PC spool (C132), spherical end first, into the PC bore. Using a new O-ring (C103A), install theplug (C103). Torque the plug (C103) to 10.8 - 13.5 N•m [8 - 10 lbf•ft].2. Place the two PC springs (C134, C135) onto the spring guide (C133) and install into the PC bore. Placea new O-ring (C138A) onto the PC adjusting screw and thread it into the PC bore until flush, thenmake another full turn. Install and torque the PC set screw (C102) to 7.5 - 10.8 N•m [5.5-8 lbf•ft].3. Install the LS spool (C112), spherical end first, into the LS bore. Using a new O-ring (C105A or C106A),install the plug (C105 or C106). Torque the plug (C105 or C106) to 10.8 - 13.5 N•m [8 - 10 lbf•ft].For PC only controls, skip steps 15 through 17.4. Using a new O-ring (C104A), install the plug (C104). Torque the plug to 10.8 - 13.5 N•m [8 - 10 lbf•ft].5. Place the two LS springs (C134, C135) onto the spring guide (C113) and install into the LS bore. Placea new O-ring (C118A) and back-up rings (C118B) onto the LS adjusting screw and thread it into the LSbore until flush, then make another full turn. Install and torque the LS set screw (C102) to 7.5 - 10.8N•m [5.5-8 lbf•ft].6. Using petroleum jelly to retain them, install the 4 interface O-rings (C200) in the recesses on thecontrol housing.7. Install the control assembly onto the endcap using the 4 screws (C300). Torque the screws to 5.4 - 7.5N•m [4 - 5.5 lbf•ft]. Torque screws in a criss-cross pattern and re-torque the first screw to ensureproper torque retention.Service ManualSeries 45 E Frame Open Circuit PumpsMinor repair32 | © Danfoss | September 2016 AX00000024en-US0401