12-66. TM 9-2320-361-20 This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) M185A3, M109A3 TM 9-2320-361-10 MATERIALS/PARTS TM 9-2320-361-20P Ten locknuts EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). 1. Remove fastener (9) from catch (5) and ladder (3). 2. Remove ladder (3) from brackets (4) and retainer (12). 3. Remove four locknuts (11), screws (7), two spacers (10), and brackets (4) from van body (1). Discard locknuts (11). 4. Remove three locknuts (8) and fastener (9) from bracket (4). Discard locknuts (8). 5. Remove two screws (2) and retainer (12) from van body (1). 6. Remove three locknuts (6) and catch (5) from ladder (3). Discard locknuts (6). 1. Install catch (5) on ladder (3) with three new locknuts (6). 2. Install retainer (12) on van body (1) with two screws (2). 3. Install fastener (9) on bracket (4) with three new locknuts (8). 4. Install two spacers (10) and brackets (4) on van body (1) with four screws (7) and new locknuts (11). 5. Install ladder (3) on brackets (4) and attach fastener (9) on catch (5). 12-106