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Service Manual

Small Rock Valve

3

Small Rock Valve Lubrication Points

Use a grease gun with the recommended grease listed in the chart below. Locate the grease points, clean the grease
fitting before filling it, and inject grease until you see old grease displaced by the new grease. Lubricate the grease
points at 8 hour intervals and whenever the machine work is completed for the day.

Minimum Specifications for grease.

Lithium base high-pressure grease KP 2 K per DIN 51502.

BP
MOBIL
SHELL
TEXACO
ARAL
ESSO
OPTIMAL

Energrease LS2
Mobilith AW 2
Alvania grease R2
Multifak 20
HLP 2
Beacon 2
Olitsa longtme 2EP

Grease Points

Grease Points

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Содержание SP ROCK

Страница 1: ...SERVICE REPAIR INSTRUCTIONS FOR THE SP ROCK VALVE DOCUMENT 98330783 5900 Centerville Road St Paul MN 55127 Tel 651 429 0999 Fax 651 429 3464 www schwing com REV 10 25 14 ...

Страница 2: ......

Страница 3: ...to assist you 6 WARNING If you will be working in a hidden area inside the machine protect yourself by taking the key from the ignition and putting a DO NOT OPERATE sign on the controls In the case of electrically driven units disconnect the main circuit breaker and lock it in the disconnected position 7 WARNING Never activate the system hydraulics without checking if another workman is in a hidde...

Страница 4: ...lled Lubrication grooves MUST face out from Rock Valve Kidney or Outlet Plate Kidney Seal Spectacle or Inlet Plate Rock Housing Cutting Ring Rock Valve Pressure Spring Bushing Seal Cover Dimensions shown are with all new wear parts Tension Nut Locking Bolt Locking Washer Centering Screw Outlet Flange Setting Disc 1 5 2 0mm 060 080 A ...

Страница 5: ...ject grease until you see old grease displaced by the new grease Lubricate the grease points at 8 hour intervals and whenever the machine work is completed for the day Minimum Specifications for grease Lithium base high pressure grease KP 2 K per DIN 51502 BP MOBIL SHELL TEXACO ARAL ESSO OPTIMAL Energrease LS2 Mobilith AW 2 Alvania grease R2 Multifak 20 HLP 2 Beacon 2 Olitsa longtme 2EP Grease Poi...

Страница 6: ...peration are irrelevant as long as the armouring is not worn out completely Spectacle or Inlet Plate Cutting Ring To ensure uniform wear and thus considerably longer service lives we recommend the following 1 Move the Rock Valve to the left and right end position once a week after thorough cleaning and check the condition of both the Cutting Ring and the Housing Lining 2 Turn the Cutting Ring 90 d...

Страница 7: ...ame direction It is only necessary to loosen the Securing Bolts of the Housing Cover approximately 10mm 3937 in order to release the Pressure Spring and turn the Cutting Ring 3 Check the distance between the Cutting Ring and the Rock after each turn of the Cutting Ring If it exceeds 8mm 315 the preten sion of the Pressure Spring is not enough to correctly press the worn cutting ring up against the...

Страница 8: ...ut Setting Disc Rebuilding the Rock Valve 1 Remove the Locking Bolt from the Tension Nut 2 Loosen the Tension Nut NOTE It s ok to remove the Tension Nut with a wrench but it must never be tightened more than hand tight 3 Remove the Tension Nut 4 Remove the Setting Disc ...

Страница 9: ... Part 30309007 6 Slide the rear housing cover back slightly 7 Center Rock Valve using a pry bar so the lever is straight up 8 Remove the Locking Bolt for the Cylinder Pin on the Slewing Yoke 9 Using a drift punch drive pin out of the hole 10 Pull yoke up and out of the slew lever Move out of the way and tie up ...

Страница 10: ...ng Kidney Seal 11 Remove 12mm bolt and lever disk from Rock shaft 12 Remove slew lever 13 Using a lifting device slide Rock Valve out of bushing and place on a work surface 14 Remove Kidney Seal and Pressure Spring Clean both ends of the Rock Valve remov ing all concrete debris ...

Страница 11: ... the Rock shaft bushing on the Rear Cover Hous ing 17 Clean the O ring groove removing all con crete debris paying special attention to the grease journals are clean NOTE Check that grease will come through from the zerk 18 Using the correct size bushing driver drive the old Rock shaft bushing out of the front cover of the Rock housing 19 Using the correct size bushing driver drive the old Rock Sh...

Страница 12: ...from the Rock Housing 22 Remove the four 20 mm bolts from the out lect delivery pipe 23 Remove the four bolts from the rear cover that attach the Kidney Plate to the rear cover 24 Remove the Kidney Plate NOTE The Kidney Plate should have a smooth mirror like finish free of any scratches gouges or wear grooves NOTE Before reassembly make sure that all components are thoroughly cleaned ...

Страница 13: ...read hole in the Set ting Disc loosen the Tension Nut to the pre vious hole and install the Locking Bolt NOTE Check to make sure that the proper clearance is obtained between the Rock Valve and the Cutting Ring and between the Rock Valve and the Kidney Plate If the Rock com ponents are worn the dimensions may be larger that specified If the dimensions are too small loosen the Adjusting Nut and pry...

Страница 14: ... of concrete could pull it out of the groove Furthermore the high pretension resulting from reassembling with concrete residue in the area of the spring leads to premature wear of the Cutting Ring and Housing Lining NOTE Slightly grease the new Pressure Spring when installing it The same applies to the Kidney Seal Do not use too much grease because grease accumulating in the spring chamber operate...

Страница 15: ...e no longer recognizable The distance indicated by M of the released kidney seal does not exceed 30mm 1 1875 Replace the outlet housing lining kidney plate only if scores deeper than 1 5mm are found in the area that contacts the kidney seal You can measure this by placing a steel ruler across the kidney plate in several places and using a depth gauge to determine the gap NOTE Outside of the area t...

Страница 16: ... is the primary cause of premature wear encountered at the outlet side of the Rock Valve If you will be repairing the Rock or troubleshooting a problem always fill the hopper with water to the top of the Rock Valve before switching 1 Remove the Locking Bolt from the Tension Nut 2 Loosen the Tension Nut NOTE It s ok to remove the Tension Nut with a wrench but it must never be tightened more than ha...

Страница 17: ... the rear housing cover back slightly 7 Remove the Kidney Seal for inspection and replace it if necessary See the previous sec tion of this manual entitled Determining Wear on the Kidney Seal and Housing Lin ing Outlet Side for reference 8 Loosen the bolt that holds the slew lever on the Rock shaft but do not remove ...

Страница 18: ...er to the pre vious section of this manual entitled Lengthening the Service Life of the Spectacle Plate Cutting Ring 10 Make sure that all parts are thoroughly cleaned and reassemble in reverse order Slide the Rock cover back into place and secure it with bolts 11 Adjust the Tension Nut which is tightened only hand tight If the Locking Bolt shown can be installed in the Setting Disc freely then do...

Страница 19: ...ecified If the dimensions are too small loosen the Adjusting Nut and pry the Rock Valve in the direction needed Stroke the unit several times and recheck the dimensions If the dimensions are correct reinstall the Tension Nut and re adjust IMPORTANT At no time should you operate the Rock Valve without first lubricating the outlet wear plate Spraying the plate with water or oil will usually be adequ...

Страница 20: ...o see where the problem may be i e articulated bearings shifting cylinder internal or Rock slewing lever may need adjustment Please call the Schwing Service Department at 651 429 0999 with any questions regarding this matter Slewing Yoke Timing Viewed From Cylinder End The slewing yoke is installed properly when the center line of the hydraulic cylinder rod is in line with the center line of both ...

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