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1 Document type: Document no.: External share: Page: Instruction 10000227431 No 1 of 5. Title: Revision: Prepared by: Approved by: Date of approval: Tool kit / Seal replacement 01 KKF EJ (SAP DMS). Instruction Cylinder repair guide Revisions and changes Rev: Prepared by Summary of changes 00 KKF New document 01 KKF The update of various parts in the toolkit 9597815. TABLE OF CONTENTS. 1 Scope .. 1. 2 2. Positions sensor .. 2. Gland .. 2. Piston .. 3. Inspect .. 3. 3 Assembly .. 4. Piston .. 4. Gland .. 4. Positions sensor.

2 5. End assembly / Inspection .. 5. 4 Tool kit no. 9597815 Vestas Item Number: 20031411 .. 5. 1 SCOPE. This instruction can be used for these toolkits / spare part repair kits: 9597815 Toolkit for pitch cylinder V52 (Vestas Item number: 20031411). 5272286L Repair kit for pitch cylinder V52 Light (Vestas Item Number: 29201008) For 5050090 V52 (108591). 5272286H Repair kit Heavy Sparepart Sales 90/ 50 For 5050090 V52 (108591). Template no: Lind Jensens Maskinfabrik A/S - Kroghusvej 7, H jmark - DK-6940 Lem - Tel.: +45 97 34 32 00 - - 9100021-100-02 This document and the information set forth herein are proprietary to Lind Jensens Maskinfabrik A/S.

3 The information is confidential and subject to copyright protection. The information must not, either wholly or partly, be copied, reproduced, or in any other way made available to any third part without written consent from Lind Jensens Maskinfabrik A/S. Document type: Document no.: External share: Page: Instruction 10000227431 No 2 of 5. Title: Revision: Prepared by: Approved by: Date of approval: Tool kit / Seal replacement 01 KKF EJ (SAP DMS). 2 DISASSEMBLY. Before disassembly, the system must be in safe mode, pressure less and the cylinder drained for oil.

4 Prepare for oil collection when dismounting cylinder enclosure. The cylinder must be removed from the windmill and brought to the workshop. POSITIONS SENSOR. Unscrew and pull the position sensor out of the cylinder. GLAND. Use a 3 mm Allen key to unscrew the screw M6 there are 2 pieces. Use the special mounting key for gland to unscrew the gland, as shown below: Template no: Lind Jensens Maskinfabrik A/S - Kroghusvej 7, H jmark - DK-6940 Lem - Tel.: +45 97 34 32 00 - - 9100021-100-02 This document and the information set forth herein are proprietary to Lind Jensens Maskinfabrik A/S.

5 The information is confidential and subject to copyright protection. The information must not, either wholly or partly, be copied, reproduced, or in any other way made available to any third part without written consent from Lind Jensens Maskinfabrik A/S. Document type: Document no.: External share: Page: Instruction 10000227431 No 3 of 5. Title: Revision: Prepared by: Approved by: Date of approval: Tool kit / Seal replacement 01 KKF EJ (SAP DMS). Slide the gland over the rod end, as shown below. PISTON. Pull the rod with piston and the damping bushing out of the tube.

6 If LIGHT repair kit: Cut the piston seal also the O-ring and back up-ring on the damping bushing with at Stanley knife. (be carefully not to damage the piston and the damping bushing). INSPECT. The square tube must be inspected - it must not be twisted. The thrust bearing in the windmill MUST be inspected. It must run with minimal friction, even when loaded. Replace and/or lubricate bearing well before mounting cylinder. Template no: Lind Jensens Maskinfabrik A/S - Kroghusvej 7, H jmark - DK-6940 Lem - Tel.: +45 97 34 32 00 - - 9100021-100-02 This document and the information set forth herein are proprietary to Lind Jensens Maskinfabrik A/S.

7 The information is confidential and subject to copyright protection. The information must not, either wholly or partly, be copied, reproduced, or in any other way made available to any third part without written consent from Lind Jensens Maskinfabrik A/S. Document type: Document no.: External share: Page: Instruction 10000227431 No 4 of 5. Title: Revision: Prepared by: Approved by: Date of approval: Tool kit / Seal replacement 01 KKF EJ (SAP DMS). 3 ASSEMBLY. Inspect tube inside for damages. Replace cylinder if scratched or worn out.

8 Oil/grease all seals/mating surfaces and threads before assembling. Be careful with the cleanliness during assembly. PISTON. Mount new seals on the damping bush. Slide the piston with rod and the damping bushing into the tube. Be carefully when the piston seal and the O- ring/back up-ring pass the tube threads and B-port. On heavy repair kits the piston seal is pre-mounted. If LIGHT repair kit: Mount a new magnet mounting and mount new guide rings and piston seal. Use the piston asssembly bush as shown below. Mount calibration bushing over piston seal, and keep it there for more than 15 min.

9 GLAND. Screw assembly bush on to the piston rod. Lubricate rod and bush surfaces well with oil/ grease. Slide the new gland with pre-mounted seals over assembly bush and piston rod, screw it into the tube, and tighten it. Make new M6 holes and mount new screws to lock the gland. As shown in section , just in reverse order. Template no: Lind Jensens Maskinfabrik A/S - Kroghusvej 7, H jmark - DK-6940 Lem - Tel.: +45 97 34 32 00 - - 9100021-100-02 This document and the information set forth herein are proprietary to Lind Jensens Maskinfabrik A/S.

10 The information is confidential and subject to copyright protection. The information must not, either wholly or partly, be copied, reproduced, or in any other way made available to any third part without written consent from Lind Jensens Maskinfabrik A/S. Document type: Document no.: External share: Page: Instruction 10000227431 No 5 of 5. Title: Revision: Prepared by: Approved by: Date of approval: Tool kit / Seal replacement 01 KKF EJ (SAP DMS). POSITIONS SENSOR. Reinstall position sensor in cylinder. Tighten with 80 Nm END ASSEMBLY / INSPECTION.