TM  10-3930-643-34 ENGINE,  FUEL,  EXHAUST  AND  COOLING  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 4-18. Water Pump Assembly. (Sheet 5 of 5) ASSEMBLY  (cont) 25. 26. 27. 28. 29. Press new seal assembly (3) into water pump housing (16). Moisten new rubber boot with water and install new ceramic seal into boot. Identification  mark  on  ceramic seal must be down. press new seal and boot (2) into impeller (1) until seal and boot (2) bottoms  in  counterbore. Support front end of shaft (7) and push down on water pump housing (16) to take bearing end plate toward the rear of water pump assembly. NOTE Since  shaft  will  protrude  slightly from impeller, use care not to damage  shaft  during  installation. Place two 0.030 inch feeler gages on opposite  sides  of  water  pump  housing (16) and press impeller (1) on shaft (7) until feeler gages are snug. NOTE Return M10A Forklift to original equipment  condition. END OF TASK 4-116