TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Table 6-23. Crankshaft Damper and Oil Filter Housing Standard and Oversize Stud Identification Fig. No. B-6 6-113 6-113 6-113 6-113 6-113 6-113 6-113 Ref. letter or No. 50 A B C D E F G Setting height 7/8 15 / 16 25/32 7/8 27 / 32 (oil pressure access cover) 1-1 / 16 1-3/ 16 (fuel pump check valve bracket) 1 No. req’d. 4 8 2 12 2 6 2 8 Stud size and length 5/16-18(3/4) x 5/16-24(19/32) x 1-1/2 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) 3/8-16(51/64) x 3/8-24(11/16) x 1-5/8 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) 5/16-18(11/16) x 5/16-24(9/16) x 1-5/16 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) 5/16-18(3/4) x 5/16-24(19/32) x 1-1/2 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) 3/8-16(27/32) x 3/8-24(7/8) x 1-3/4 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) 5/16-18(13/16) x 5/16-24(19/32) x 1-11/16 (STD) (0.003 in. OS) (0.007 in. OS) (0.012 in. OS) Note. Refer to figure 6-1 for oversize stud e. Assembly. Refer to figures 6-111 through 6- identification. 101, 4-92 through 4-89, 6-100, and 6-99. Section VIII. OVERHAUL OF FRONT FAN DRIVE HOUSING AND CLUTCH ASSEMBLY 6-39. General a. This section covers the overhaul of the front fan drive housing and clutch assembly. Specific instructions on disassembly, cleaning, in- spection, repair and assembly accompany the overhaul operations. Overhaul standards of individual components follow the inspection procedures. Stud identification information is included in the repair procedures. Refer to the following table (table 6-24) for applicable illustrations and instructions for overhaul operations. b. Fan drive housings on original production engines were modified. to include an oil restrictor in the horizontal oil passage, and can be iden- tified by the hex-head on the restrictor (fig. 6- 127). The housings on improved design engines were redesigned to eliminate the need for restrictors, and can be identified by the hex socket head pipe plug in the horizontal oil passage on the side of the housing. These changes were made without part number change, which necessitates identification as “engines having oil restrictors”. c. The clutch assemblies were redesigned for simplification and are identified by different part numbers. Although the clutches are similar, disassembly and assembly procedures differ. Visual identification of piston actuated and mechanical clutches is shown in figure 4-102. The clutches are interchangeable as assemblies only. 6-108