b. Medium Wrecker (M816) and Tractor Wrecker (M819) (Cont'd)
Dipstick on hydraulic crane oil reservoir measures oil level.
Filter indicator on front of hydraulic oil reservoir indicates if crane oil filter is
clean or needs cleaning. Filter element must be changed when indicator is on
Electric brake lock switch locks vehicle service brakes in hold position when
wrecker crane is in use.
Transfer power takeoff control lever, when pulled up, supplies drive power to
hydraulic pump to operate crane controls. When pushed down, cuts power to
crane controls (M816 and M819).
Wheel chocks are intended for use during parking in hilly areas and for blocking
disabled vehicles while undergoing maintenance. Refer to FM 21-305.
Change 1 2-17