Service Bulletin #08 October 5, 2008 Models Affected: SJ 727, SJ 735, SJ 883, SJ 884, SJ 9250 SJ 727 and SJ735 34020, 340203, 340226, 340259, 340260, 340285 to 340287, 340292, 340302 to 340304, 340349, 340444, 340462, 340476, 340476, 340477, 340482, 340483, 340534 to 340536, 340697, 340742 to 340745, 340756 to 340759, 34079 to 340793, 340846 to 340849, 34085, 340852, 340865 to 340868, 3400 to 3408, 34084, 34085, 3425 to 3428, 34400 to 34405, 34427 to 34430, 34449 to 3445, 34456 to 34458, 3452, 34776, 34777, 34790 to 34798, 34803 to 34805, 34828, 34832 to 34835, 34839 to 34848, 34850, 34938, 34939, 34944, 34945, 34950, 3495, 342097 to 34202, 34223 to 34228, 342406 to 3424, 342450, 342526, 34256 to 3425666, 34000268, 34000269, 34000285. SJ 883 3736, 37365 to 37368, 37372, 37374 to 37380, 37387, 37388 37395 to 37404, 37422 to 37436, 3744 to 37445, 37447, 37456, 37457, 37462 to 37468, 37476 to 37480, 37490 to 37492, 37552, 37582 to 37587, 376 to 3765, 37640 to 37646, 37653 to 37655. SJ 884 42823, 42825 to 42827, 42829, 42830, 42848, 42849, 42857, 42859 to 42886, 42890, 42892, 42894 to 42905, 42930, 42953, 42959, 42960, 42963 to 42966, 42973, 42985 to 42989, 42993 to 43003, 4302 to 43028, 43035 to 4304, 43045 to 43049, 43052, 43053, 43055 to 43058, 43065 to 43068, 43075, 4308, 43082, 43085 to 43094, 4300, 430, 430 to 433, 436, 4320, 43202, 43226 to 43228, 43236, 43237, 4327, 43272, 43274, 43284, 43286 to 43300, 43305 to 4335, 43322, 43353 to 43360, 4338 to 43384, 434 to 43420, 43493 to 43498, 435, 4355, 4356, 43535 to 4354, 43547, 4358 to 43585, 43742, 43744, 4382 to 4385, 40000032 to 40000035, 40000053, 40000054, 4000007, 40000072, 40000093, 40000094, 40000, 400002, 4000028, 4000029, 4000048, 4000049, 4000056 to 4000058, 4000070 to 4000072, 4000085 to 4000087, 4000098 to 40000207, 40000390 to 40000393, 40000403, 40000404, 4000045, 4000046, 40000424 to 40000427, 4000048 to 4000484, 40000502, 40000503, 40000530, 4000053. SJ 9250 5079, 5082 to 509, 5094, 5096, 5099 to 502, 507 to 5, 54, 55, 58, 59, 523 to 527, 539 to 549, 553 to 557, 559 to 56, 572 to 58, 586, 587, 589 to 597, 5200 to 5205, 5207, 5209, 52, 523 to 525, 528 to 522, 5223, 5226, 5227, 5230, 523, 5235, 5238 to 5242, 5245, 5246, 5267 to Skyjack Corporation USA 345 Swenson Ave St. Charles IL 6074 USA INDUSTRIAL GROUP Tel: 630 2622 0005 Fax: 630 262 0006 linamar.com skyjack.com A Division of Linamar Holdings Inc.
5272, 5275 to 5277, 5280 to 5283, 5286 to 5288, 5297, 5299, 5304 to 5306, 536 to 538, 5320 to 5323, 5326 to 5329, 533 to 5333, 5337 to 5340, 5343 to 5360, 5362 to 537, 5396, 545 to 5457, 5465 to 5468, 5470, 5484, 5485, 5493 to 5496, 5498, 5499, 5503 to 5505, 5524 to 5528, 5534 to 554, 5545 to 5578, 5580 to 5586, 5593 to 560, 5627, 5629 to 5633, 5644, 5650, 5665 to 5670, 5676 to 5680, 5696 to 5703, 573, 574, 5732 to 5734, 5742. Introduction: In our continuing effort to provide the safest possible product to our customers and yours, we require that the following hub bearing assembly replacement be completed for all machines listed above. Component materials and assembly procedure combined with maintenance factors may lead to the life expectancy of this assembly being less than expected. Procedure: All units within the above serial number ranges must have the attached hub bearing assembly replacement completed as specified in the attached procedure. Parts and Warranty Policy: Skyjack Inc. will pay up to 2 hours of labor for replacement of these assemblies. Request the necessary parts to complete this bulletin by using attached part request form. Upon completion of this service bulletin, please submit a warranty claim form for each machine stating that Service Bulletin #08 has been completed. Ownership of Machines: If you have sold or transferred a machine(s) with the serial numbers listed above, it is your responsibility to forward this service bulletin to the current owner and to notify Skyjack Inc. Contact Information: We regret the inconvenience and appreciate your cooperation. If you have any questions please call Skyjack Service at 800-275-9522, 630-262-0005 or 0044 69 676 235 (Europe). You can e-mail any questions to service@skyjack.com. Skyjack Corporation USA 345 Swenson Ave St. Charles IL 6074 USA INDUSTRIAL GROUP Tel: 630 2622 0005 Fax: 630 262 0006 linamar.com skyjack.com A Division of Linamar Holdings Inc.
Service Bulletin #08 Parts Kit Shipment Request Form Customer Name: Date: Customer Location: Address: Phone: City: Fax: State: Zip: Contact Name: We are requesting parts kit shipment for the following machines to comply with Service Bulletin #08. Please fill in the serial numbers of units in your possession that require a parts kit shipment for this bulletin to be completed. Machine Serial Number Machine Serial Number Machine Serial Number Please Fax This Form To: Skyjack Service Fax: (630) 262-0006 or 44-69-676-238 (Europe) If you have any questions please call Skyjack Service at 800-275-9522, 630-262-0005 or 44-69-676-235 (Europe). You can e-mail any questions to service@skyjack.com If you have sold or transferred a machine(s) with the serial numbers listed above, it is your responsibility to forward this service bulletin to the current owner and to notify Skyjack Inc. Skyjack Corporation USA 345 Swenson Ave St. Charles IL 6074 USA INDUSTRIAL GROUP Tel: 630 2622 0005 Fax: 630 262 0006 linamar.com skyjack.com A Division of Linamar Holdings Inc.
Part # 2520AA TM 2WD Hub Bearing Assembly Replacement Models SJ7xx, SJ8xxx & SJ9250 2520AA October 2008
Table of Contents 2WD Hub Bearing Assembly Parts Inventory...3 Procedure...4 WARNING Only trained and authorized personnel shall be permitted to service an aerial platform. WARNING Read all instructions closely before attempting each step of the installation. If you have questions with any of the steps in this procedure, contact SKYJACK Service Department at: North America & Asia: Europe: ( : 800 275-9522 ( : 44-69-676-235 7 : 630 262-0006 7 : 44-69-676-238 If you have not received the complete parts inventory, contact SKYJACK Service Department. As specified in parts inventory, two kits are required to complete this bulletin. SKYJACK, Page 2 October 2008 2520AA
2WD Hub Bearing Assembly Parts Inventory 4 5 7 8 9 0 6 2 3 Index No. Skyjack Part No. Qty. Description - 46485 2 FIELD KIT, 2 3 4 5 6 7 8 9 0 2 03220 03085 52067 02646 03009 02978-02979 03004 2044-2520 DUST CAP COTTER PIN, 3/6 x -/2 CASTLE FLANGED NUT, -4 WASHER, HARDENED BEARING CONE - LM48548 BEARING CUP - LM4850 Reference: HUB, FRONT, 5000 LB. * BEARING CUP - LM6030 BEARING CONE - LM603049 GREASE SEAL Reference: Spindle Weldment * FIELD INSTRUCTION, : * - not included in the kit 2520AA October 2008 SKYJACK, Page 3
Procedure 4 5 7 8 9 0 6 2 3 Figure. Hub Assembly - with Castle Nut Keep work area clean and visibly free from contamination at all times.. Ensure aerial platform is parked on a firm, level surface. Chock or block the wheels to keep the aerial platform from rolling forward or backward. 2. Fully lower the platform. 3. Using a suitable lifting device or outriggers (if equipped), lift the end of the aerial platform with the steer axle. CAUTION Use a suitably-rated support stand to support aerial platform while performing the following operations. 4. Turn emergency main power disconnect switch to off position. 5. Remove wheel assembly. 6. Remove dust cap (item ) to access internal components of hub assembly. 7. Pull cotter pin (item 2) out of spindle arm (item ) and then remove castle nut (item 3), washer (item 4) and outer bearing cone (item 5). Dispose of dust cap, cotter pin, castle nut, washer, and outer bearing cone. 8. Flip hub over and then remove and discard inner bearing cone (item 8) and grease seal (item 0). 9. Remove and discard both inner and outer bearing cups (items 6 & 8) from hub. 0. Remove grease from spindle arm and hub and look for signs of visible damage. If damage is found on the hub or on the spindle arm, contact Service Department immediately using information found in page 2 for further instructions.. Press new bearing cups (items 6 & 8) into hub. 2. Pack replacement inner and outer bearings by either pressing wheel bearing grease into each roller by hand or using a bearing packer and grease gun. Ensure that grease is forced into all surfaces of the bearing. SKYJACK, Page 4 October 2008 2520AA
Castle Flanged Nut Figure 2. Hub Assembly - with Castle Flanged Nut Use only recommended wheel bearing grease - NLGI (National Lubricating Grease Institute) Grade #2 or equivalent. The bearings must be packed before installing. 3. Install replacement inner bearing in the race and then seat the new grease seal. Flip hub over and install replacement outer bearing. 4. Install hub on the spindle. 5. Install replacement washer and replacement castle flanged nut. Hand tighten the castle flanged nut until it touches the washer. Turn hub by hand to ensure smooth running. No resistance should be felt at this time. 6. Take a torque wrench and set it at 30 ft-lb, and while continuously rotating hub, tighten castle flanged nut. While hub is being turned and nut tightened, resistance will increase. 8. Using a torque wrench set to 5 ft-lb, tighten castle flanged nut. Turn wheel hub and check for smooth turning. 9. Check for alignment of the castle flanged nut with one of the cross holes in spindle arm. If required, loosen nut to align with nearest hole. Use an open-ended wrench to be able to see the cross holes. The nut should not be turned more than 5 degrees. Secure with new cotter pin. Check again for smooth turning of wheel hub. The wheel hub should turn but with slight resistance. 20. Grab the top and bottom of the hub and check for play. There should be no evidence of play. 2. Install dust cap back on hub assembly. 22. Install wheel assembly. Torque nuts or bolts to 40 ft-lb. 23. Repeat steps 5 to 22 for the other hub assembly. 24. Lower the aerial platform. 7. Using an open-ended wrench, loosen castle flanged nut a /4 turn while turning the wheel hub. It should turn easily. The nut should not come completely loose. 2520AA October 2008 SKYJACK, Page 5
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