Assembly Instructions; Pvg 16 And 32 General Conditions; Assembly - Danfoss PVG 16 Service Manual

Service Manual
PVG 16 and 32 Service Assembly/Disassembly Guide

Assembly instructions

PVG 16 and 32 general conditions

Assembly

© Danfoss | November 2017
The specification sheet is compiled by the sales department for assembly of a new PVG 16 and PVG 32
valve groups.
1. Before, during and after the assembly/disassembly of new PVG groups, absolute cleanliness and care
must be observed with regard to internal and external parts of the units concerned.
2. Use non-volatile, petroleum based solutions for cleaning valves and/or modules.
3. Replace all parts considered likely to cause malfunction during subsequent testing.
4. Replace all loose O-rings (without exceptions) with new O-rings.
5. Lubricate all moving parts with hydraulic oil before assembly.
6. Lubricate all O-rings with petroleum jelly.
Refer to Service Manual 520L0515 for module designations, item and spare parts numbers.
The basic assembly sequence for PVG 16 and PVG 32 group is as follows:
1. Starting from the end plate place the module with (PVS, PVSP, PVSK ) the tie rod bolts with the long
threaded end pointing upwards ready for mounting of PVB modules.
2. Place all lubricated O-rings in their respective grooves in the different modules.
3. Locate the basic modules (PVB) against the PVP (PVS, PVSP, PVSK) using the tie rod bolts for
alignment between the PVP and the PVB modules making sure the LS shuttle valve is able to move
freely.
4. Place the PVP (the PVS if a valve group has midinlet, or HIC) as the last module and place the washers
and nuts in position and hand tighten the valve.
5. Place the valve on a plain and level surface and tighten the assembly to a torque of 28 ±2 N•m (247.8
±17 lbf•in) using a 13 mm socket. Max. level tolerance is 0.5 mm per section e.g. this means with 8 PVB
sections max. allowable height difference between the mounting holes would be 4 mm (this would
also be seen as a twist in the valve group assembly).
The valve assembly is to be assembled in accordance with the specification sheet.
6. Install the spools (PVBS) into the PVB's.
The assembled spool is marked with two four-digit numbers
The number in the end of the spool where the plug is fitted, "B", is the drawing number of the spool
and indicates that this end must face towards the "B" port of the valve.
The other number, stamped on the side the PVBS pull rod "A", is the module number of the
assembled main spool.
For spool assemblies with remote hydraulic spools, the centering spring is different. The standard
spring has a wire diameter of 1.9 mm. The remote hydraulic spring (5-15 bar) has a wire diameter of
2.8 mm.
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