John Deere 2250 2450 2650 2650N and 2850 Tractors Technical Manual TM4440 01JAN91

05— SAFETY

10- GENERAL
10 — Predelivery, delivery and after-sales
15 — Lubrication and service
20 — Tune-up
25 — Tractor separation

20 – ENGINE
— viscous fan drive and fan
– FUEL AND AIR INTAKE SYSTEM

30 — Fuel tank, auxiliary tank and water trap
10 — Cold weather Starting aids
15 — control
20 — Air cleaner

40 – ELECTRICAL SYSTEM
— Wiring harnesses
10 — Controls and instruments
(with SG2
15 — Controls and instruments
cab)
20 — Controls and entrustments
(with MCI cab)
21 — Adjusting digit
25 — Lighting system
— Starting rotor
35 — Alternator

50- POWER TRAIN
05— Clutch operating systems
10 — engine Clutch
15 — engine clutch
20 — Hi-Lo Shift unit
25 — Creeper transmission
26 — Hydrostatic creeper transmission
30 — Transmission — shift
35 — Transmission — center shift
40 — Synchronized transmission and
oil pump
45 — Collar shift transmission and
transmission oil
50 — Final drives
55 — PTO shafts
65 — Continuous running PTO
70 – Front PTO
75 — Front wheel drive u.j. drive
shaft and disk Clutch

60- STEERING SYSTEM AND BRAKES
05 — Hydrostatic steering
10 — cylinder
(without front wheel drive)
15 — Power steering
20 — Manual steering
25 — Hydraulic brakes
30 — Handbrake
35 — Hydraulic trailer brake

70 – HYDRAULIC SYSTEM
— Valves
10 — Hydraulic pumps
15 — Rockshaft
25 — Selective control valves (spool-type)
Selective control valves (poppet-valve type)
35 ISO breakaway couplers
40 — ISO quick couplers
45 — Remote cylinder

80 – MISCELLANEOUS
05 Front axle
10 — Front and rear wheels
15 — “AXLA” pickup trailer hitch
20 — Height-adjustable trailer hitch

90 – OPERATOR’S STATION
05 Safe handling of refrigerants
06 — Servicing air conditioning system
07 — Compressor (up to tractor Serial No. 949L)
08 — Compressor (from tractor Serial No. 646 950L)
09 — Components of air conditioning system
10 — Cab ventilation and heating (SG2 cab)
15 — Cab ventilation and heating
(SG2 low-profile cab)
20— Cab ventilation and heating (MCI cab)
25 — Operator’s seats
W – SG2 cab
35 — MCI cab
40 — 2-post roll guard
45 — 4-post roll guard