background image

See figur es 12 - 20 for a

pictorial explanation.
1. Once the cartridge kit 

has been removed from the

housing, place the kit on a clean

flat bench, outlet support plate

down. (Figure 12)
2. Remove the two socket head

cap screws holding the kit

together. Note the location of

the two screws in the inlet plate.

When the kit is reassembled in

the opposite direction, these

screws will be installed in the

opposite set of inlet plate holes.

(Figure 13)
3. Slide the inlet support plate

off of the inlet wafer plate.

(Figure 14)
4. Remove the inlet wafer plate,

cam ring, rotor, vanes, and

outlet wafer plate as one unit

from the outlet support plate.

(Figure 15)
5. Rotate this group of

components 180 degrees 

and place it back on the outlet

support plate. The etched arrow

in the ring should be pointing

the opposite direction as before.

Do not attempt to remove the

vanes. They should be contained

between the wafer plates as the

180 ° rotation is performed. 

(Figure 16)
6. Align the inlet windo ws 

of the wafer plates to the inlet

windows of the outlet support

plate.Place the inlet support

plate back on the rotating group,

aligning its inlet windows with

the rest of the kit. Reinstall and

finger tighten the socket head

cap screws in the opposite set

of holes as before. In order for

the kit to fit back in the housing,

it must first be aligned. This can

be done by placing the kit on its

side and rolling it on a hard, flat,

clean bench. While the kit is on

its side, tighten the SCHS snug.

Finally, place the kit upright and

tighten the screws to the torque

specs below (Figures 17-20):

25 VMQ       20 in.lb. (2.28 Nm)
35 VMQ       20 in.lb. (2.28 Nm)
45 VMQ       40 in.lb. (4.55 Nm)

All parts must be thoroughly

clean and kept clean during

inspection and assembly. 
1. Remove the shaft seal(s), 

O-rings, back-up rings and seal

pack subassemblies. Use a new

seal kit for reassembly. Refer to

the VMQ parts catalog for kit

numbers.
2. If the pump has

demonstrated poor performance

or loud noise, the cartridge 

kit must be replaced. These

problems were a result of a poor

system condition. Check inlet

conditions, fluid cleanliness, and

other system components that

may be faulty before installation

of a new cartridge kit.
NO TE:

Pre-assembled replacement

cartridge kits are available. 

If the old cartridge is worn

extensively, a new kit should 

be used.
3. Rotate the bearing while

applying pressure to check for

wear, looseness and pitted or

cracked races.
4. Inspect seal and bushing

mating surfaces on shaft for

scoring or wear. Replace 

the shaft if marks cannot be

removed by light polishing.

20

Single, Double, T riple and Thru-drive Pumps  Overhaul Service Manual  V-PUVN-TS001-E  October 2002

Section VI  —

Overhaul (cont.)

Figure 13

Figure 14

Figure 15

Figure 16

C. Driv e Reversal (cont.)

D. Inspection and Repair

TABLE 8. CARTRIDGE KIT BUSHING LOCATIONS AND KIT ROTATION SETUP

(location of bushing in cartridge kit, assuming a right hand rotation shaft)
R = right hand rotation kit

L = left hand rotation kit

Pump

Shaft End Kit

Center Kit

Cover End Kit

25, 35, 45 Single 

Inlet Plate (R)

& Thru-Drive (R)
2525 Double (R)

No Bushing (R)

Outlet plate (L)

3525 Double (R)

Inlet Plate (R)

No Bushing (L)

4525 Double (R)

Inlet Plate (R)

No Bushing (L)

4535 Double (R)

Inlet Plate (R)

No Bushing (L)

352525 Triple (R)

Inlet Plate (R)

No Bushing (L)

Outlet Plate (L)

453525 Triple (R)

Inlet Plate (R)

Outlet Plate (L)

No Bushing (L)

*

Note:

The opposite rotating kits would be used in a (L) pump.

Summary of Contents for Vickers VMQ125S

Page 1: ...e Double Triple andThru Drive Pumps Over haul Service Manual VMQ125S VMQ135S VMQ145S VMQ125T VMQ135T VMQ145 VMQ22525 VMQ23525 VMQ24525 VMQ24535 VMQ3352525 VMQ3453525 Series 30Design AX447680796360en 0...

Page 2: ...9 D Wafer Plate Operation 9 E Outlet Bodies 10 IV INSTALLATION AND OPERATING INSTRUCTIONS A Installation Drawings 10 B Mounting and Drive Connections 10 C Shaft Rotation 11 D Piping and T ubing 11 E...

Page 3: ...bed in detail and their theory of operation is discussed in addition to instructions for installation maintenance and overhaul The general series of models covered are VMQ125S VMQ135S VMQ145S VMQ125T...

Page 4: ...TS001 E October 2002 Section II Description cont Figure 1b Cutaway View of Typical High Performance VMQ Double Vane Pump Figure 1c Cutaway View of Typical High Performance VMQ Triple Vane Pump Cover H...

Page 5: ...ange frame size 35 SAE B E In line with mounting flange frame sizes 25 45 F 90 to mounting flange frame sizes 25 45 G 45 CCW to mounting flange frame size 35 H 45 CW to mounting flange frame size 35 S...

Page 6: ...pilot 14 1 0 56 slots on 140 0 5 51 bolt circle D Frame sizes 35 45 only ISO 3019 2 125A2HW 2 bolt 125 00 4 921 x 9 2 0 36 pilot 18 1 0 71 slots on 180 0 7 09 bolt circle Adapter flange 0 None standar...

Page 7: ...0 69 slots on 181 0 7 13 bolt circle B ISO 3019 2 125A2HW 2 bolt 125 00 4 921 x 9 2 0 36 pilot 18 1 0 71 slots on 180 0 7 09 bolt circle Input shaft type 01 SAE J744 keyed Frame size 35 31 75 1 250 Fr...

Page 8: ...utlet port causes the vanes to follow the elliptical inner surface of the ring Radial movement of the vanes and turning of the rotor causes the chamber volume between the vanes to increase as the vane...

Page 9: ...the pump The position of the wafer plates in the cartridge kit can be seen in Figure 5 VMQ wafer plates have a bronze finish that rides next to the rotor and provides excellent wear and thermal shock...

Page 10: ...Installation and Operating Instructions A Installation Drawings See the series 30 VMQ product catalog for installation dimensions B Mounting and Driv e Connections Danfoss high performance vane pumps...

Page 11: ...ystem and or by proper filtration of the air 5 Proper oil filling and servicing of filters breathers reservoirs etc cannot be overemphasized 6 Good sy stem and reservoir design will insure that aerati...

Page 12: ...ir will be recycled through the system 3 Aerated fluid can also be caused by ingestion of air through the pipe joints of inlet lines high velocity discharge lines cylinder rod packings or by fluid dis...

Page 13: ...filter which would ordinarily be trapped or can cause the bypass to open resulting in a partial or complete loss of filtration 4 Air bubbles in the reser voir can ruin the pump and other components I...

Page 14: ...hich may be too slow to prime the pump Vane s stuck in the rotor slots s Disassemble the pump Check for dirt or metal chips Clean the parts thoroughly and replace any damaged pieces If necessary flush...

Page 15: ...t Support Plate Inlet Cover Assembly Pin Kit Seals Housing Bolt Inlet Wafer Plate Inlet Support Plate Cartridge Torque Pin Vane and Under Vane Pin Rotor Retaining Ring Back Up Ring Anti Rotation Torqu...

Page 16: ...que Specs INLET HOUSING THRU DRIVE ADAPTOR SAE A SAE B THRU DRIVE ADAPTOR SAE C ISO NM SAE ft lb ISO NM SAE ft lb ISO NM SAE ft lb Dry Oiled Dry Oiled Dry Oiled Dry Oiled Dry Oiled Dry Oiled VMQ125T 1...

Page 17: ...d Dry Oiled Dry Oiled Dry Oiled Dry Oiled VMQ22525 153 16 115 12 113 11 85 9 VMQ23525 305 31 229 23 225 23 169 17 153 16 115 12 113 11 85 9 VMQ24525 305 31 229 23 225 23 169 17 153 16 115 12 113 11 85...

Page 18: ...M SAE ft lb ISO NM SAE ft lb ISO NM SAE ft lb Dry Oiled Dry Oiled Dry Oiled Dry Oiled Dry Oiled Dry Oiled VMQ22525 153 16 115 12 113 11 85 9 VMQ23525 305 31 229 23 225 23 169 17 153 16 115 12 113 11 8...

Page 19: ...tective jaws to avoid damage to the body and its machined surfaces Mark the pump body and cover for correct reassembly Remove the necessary screws to disassemble the housing Remove all Housing O Rings...

Page 20: ...Nm 35 VMQ 20 in lb 2 28 Nm 45 VMQ 40 in lb 4 55 Nm All parts must be thoroughly clean and kept clean during inspection and assembly 1 Remove the shaft seal s O rings back up rings and seal pack subass...

Page 21: ...e bullet with petroleum jelly and carefully push the shaft through the seal s until the bearing is within the body Install the large spiralox ring into the body snap ring groove behind the bearing 6 I...

Page 22: ......

Page 23: ...foss Power Solutions ApS Nordborgvej 81 DK 6430 Nordborg Denmark Phone 45 7488 2222 Danfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 Danfoss Power Soluti...

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