Volvo L20B Compact Wheel Loader Service Repair Manual

Service Information Document Title: Function Group: Information Type: Date: Description 000 Service Information 2014/3/6 0 Profile: CWL, L20B [GB] Description The L20B wheel loader has a central articulating oscillating joint and four-wheel drive. The lifting frame is equipped with a hydraulic quick-change attachment bracket. Parallel kinematics provide high breakout force and exact parallel guidance when lifting. The engine is a four-cylinder, four-stroke, in-line diesel engine with direct injection and oil/air cooling. The hydrostatic transmission provides full power shift under load, both when changing direction (forward and reverse) and between ranges. Maximum drawbar force can be achieved in all ranges. The "inch/brake pedal" provides variable machine speed control and power transfer. The front and rear axles are planetary rigid axles with 100% hydraulically engagable/disengagable differential locks on both axles. The service brake is a drum brake acting on the wheels of the front axle and is operated via the "inch/brake pedal". The parking brake is a drum brake acting on the wheels of the front axle upon mechanical engagement. The hydraulic system is a thermostatically regulated oil circuit with integrated cooling system. Three-spool control valve with primary and secondary fuse protection. Figure 1

Service Information Document Title: Function Group: Information Type: Date: Tightening torques 030 Service Information 2014/3/6 0 Profile: CWL, L20B, L25B [GB] Tightening torques Wheel nuts Wheel nuts Thread M Wrench size (width across flats) Tightening torque (Nm) M22 x 1.5 30 560 – 600 Hydraulic connections, general Before fitting pipe couplings, plugs and hoses:    Make sure that the sealing surfaces are clean and free from pores or scratches. Check elastic seal rings for defects. Oil in threads, sealing surfaces and contact surfaces except for ORFS-connections (ORFS = O-Ring Face Seal). Valve connections Valve connections, ORFS-connections with ED seals (DIN 3852 form E) Connection thread (mm) Wrench size, width across flats (mm) Tightening torque (Nm) M10 x 1.0 19 M12 x 1.5 17 37 M14 x 1.5 22 58 M16 x 1.5 22 74 M18 x 1.5 24 94 M20 x 1.5 130 M22 x 1.5 27 140 M27 x 2.0 32 190 M33 x 2.0 41 330 M42 x 2.0 50 470 M48 x 2.0 55 570 Connection thread (inches) Wrench size, width across flats (mm) Tightening torque (Nm) G 1/8 17 alt. 19 19 G 1/4 19 alt. 22 58 G 3/8 22 alt. 27 84

G 1/2 27 alt. 32 120 G 3/4 32 alt. 41 190 G 1 41 alt. 46 330 G 1 1/4 50 470 G 1 1/2 55 570 Valve connections, ORFS-connections with O-ring seals (ISO 6149) Connection thread (mm) Wrench size, width across flats (mm) Tightening torque (Nm) M8 x 1.0 11 M10 x 1.0 21 M12 x 1.5 17 alt. 19 37 M14 x 1.5 19 alt. 22 47 M16 x 1.5 22 58 M18 x 1.5 24 alt. 27 74 M22 x 1.5 27 alt. 32 110 M27 x 2.0 32 180 M33 x 2.0 32, 41 alt. 46 330 M42 x 2.0 50 350 M48 x 2.0 55 440 Connection thread (inches) Wrench size, width across flats (mm) Tightening torque (Nm) 7/16 – 20 UNF 16 21 1/2 – 20 UNF 26 9/16 – 18 UNF 19 37 3/4 – 16 UNF 22 74 7/8 – 14 UNF 27 110 1 1/16 – 12 UNF 41 180 1 5/16 – 12 UNF 41 284 1 5/8 – 12 UNF 50 300 1 7/8 – 12 UNF 55 390 Blanking plugs Blanking plugs with ED seal Connection thread (mm) Allen key dim. (mm) Tightening torque (Nm) M10 x 1.0 5 12 M12 x 1.5 6 25 M14 x 1.5 6 35 M16 x 1.5 8 55 M18 x 1.5 8 65

M20 x 1.5 10 80 M22 x 1.5 10 90 M26 x 1.5 12 100 M27 x 2.0 12 140 M33 x 2.0 17 230 M42 x 2.0 22 360 M48 x 2.0 24 360 Connection thread (inches) Allen key dim. (mm) Tightening torque (Nm) G 1/8 5 13 G 1/4 6 30 G 3/8 8 60 G 1/2 10 80 G 3/4 12 140 G 1 17 200 G 1 1/4 22 400 G 1 1/2 24 450 Blanking plugs with O-ring seal (ISO 6149) Connection thread (mm) Allen key dim. (mm) Tightening torque (Nm) M10 x 1.0 5 20 M12 x 1.5 6 35 M14 x 1.5 6 45 M16 x 1.5 8 55 M18 x 1.5 8 70 M20 x 1.5 10 80 M22 x 1.5 10 100 M26 x 1.5 12 130 M27 x 2.0 12 170 M33 x 2.0 14 310 M42 x 2;0 22 330 ORFS-connections ORFS-connections (ISO 8434-3) Thread (inches) Wrench size, width across flats (mm) Tightening torque (Nm) * 9/16 – 18 UNF 17 alt. 19 25 11/16 – 16 UN 22 35 13/16 – 16 UN 24 55 1 – 14 UNS 30 85 1 3/16 – 12 UN 36 120 1 7/16 – 12 UN 41 alt. 46 160

1 11/16 – 12 UN 50 200 2 – 12 UN 60 260 * Threads and sealing surface must not be oiled in before tightening. Hose clamps Hose clamps with worms Intended for hose outside diameter (mm) Wrench size, width across flats (mm) Tightening torque (Nm) 10 – 19 7 2.5 20 – 30 7 3.5 31 – 49 7 4.5 50 – 231 7 5.5 Bolts and nuts The pretensioning force achieved at a given tightening torque depends on the coefficient of friction of the bolted joint. The coefficient of friction in turn depends on the surface texture, surface treatment and lubricated condition. The values are calculated assuming a coefficient of friction of 0.2 for a dry chromated flange bolt and 0.15 for a lubricated chromated flange bolt. The lower torque for Allen bolts and traditional hex bolts, in relation to flange bolts, is due to the shorter torque arm for the frictional force under the bolt head (smaller diameter of bolt head). The following abbreviations for surface treatment are used in the tables:   Fe/Zn-Fe = Black chromated zinc - iron FZB = Blank chromated NOTE! In some body parts, there are weld bolts with much lower strength than normal bolts of the same dimension. NOTE! When Nordloc washer is used, increase the torque by 20%. NOTE! Bolts provided with liquid alt. micro-capsuled thread locker or thread sealant shall be tightened with the same torque as a lubricated bolt of the same type. Flange bolts Blind rivet nut Thread (mm) Wrench size, width across flats (mm) Torque (Nm) Torque (Nm) 8.8 Fe/Zn-Fe Dry 8.8 Fe/Zn-Fe Lubricated 10.9 Phosphated 10.9 Phosphated Lubricated Dry M5 8 7 6 6 M6 10 12 10 10 M8 12 28 24 24 M10 14 56 48 70 60 48 M12 17 100 85 125 105 82 M14 18 160 140 200 175

M16 21 250 220 320 275 Hex bolts and Allen head bolts Blind rivet nut Wrench size (width across flats) Torque (Nm) Torque (Nm) Thread (mm/inch) Hex bolt (mm/inch) Allen head bolt (mm/ inch) 8.8 FZB & Fe/Zn-Fe Dry 8.8 FZB & Fe/Zn-Fe Lubricated 10.9 Phosphated Lubricated 12.9 Untreated Lubricated Dry M5 8 4 6 5 6 M6 10 5 10 9 20 10 M8 13 6 25 22 40 24 M10 16 8 50 44 60 80 48 M12 18 10 90 75 105 140 82 M14 21 12 140 125 175 220 M16 24 14 220 190 275 340 M20 30 17 450 380 540 650 M24 36 19 770 660 900 1 120 M27 41 – 1 100 940 1 350 1 620 M30 46 22 1 500 1 280 1 840 2 210 M36 55 2 500 2 300 3 210 3 850 1/4 UNC 7/16 3/16 12 10 15 20 5/16 UNC 1/2 1/4 25 21 30 40 3/8 UNC 9/16 5/16 45 38 55 70 7/16 UNC 5/8 65 55 90 1/2 UNC 3/4 3/8 100 85 130 170 9/16 UNC 13/16 145 123 190 Nuts on weld bolts (material S235JRG2-EN 10025) Thread Torque (Nm) M6 5 M8 12 Tolerances Modern high-quality torque wrenches normally give a variation of ± 5 % of the indicated value. This, together with variations in friction coefficient, gives a range in the pretensioning force of approximately ± 16 % for lubricated bolted joints and ± 29 % for dry bolted joints.

Service Information Document Title: Function Group: Information Type: Date: Conversion tables 030 Service Information 2014/3/6 0 Profile: CWL, L20B, L25B [GB] Conversion tables Length Unit cm m km in ft yd mile cm 1 0.01 0.00001 0.3937 0.03281 0.01094 0.000006 m 100 1 0.001 39.37 3.2808 1.0936 0.00062 km 100000 1000 1 39370.7 3280.8 1093.6 0.62137 in 2.54 0.0254 0.000025 1 0.08333 0.02777 0.000015 ft 30.48 0.3048 0.000304 12 1 0.3333 0.000189 yd 91.44 0.9144 0.000914 36 3 1 0.000568 mile 160930 1609.3 1.6093 63360 5280 1760 1 1 mm = 0.1 cm - 1 mm = 0.001 m Area Unit cm2 m2 km2 a ft2 yd2 in2 cm2 1 0.0001 - 0.000001 0.001076 0.000012 0.155000 m2 10000 1 0.000001 0.01 10.764 1.1958 1550.000 km2 - 1000000 1 10000 1076400 1195800 - a 0.01 100 0.0001 1 1076.4 119.58 - ft2 - 0.092903 - 0.000929 1 0.1111 144.000 yd2 - 0.83613 - 0.008361 9 1 1296.00 in2 6.4516 0.000645 - - 0.006943 0.000771 1 1 ha = 100 a - 1 mile2 = 259 ha = 2.59 km2 Volume Unit cm3 = cc m3 l in3 ft3 yd3 cm3 = ml 1 0.000001 0.001 0.061024 0.000035 0.000001 m3 1000000 1 1000 61024 35.315 1.30796 dm3(l) 1000 0.001 1 61.024 0.035315 0.001308 in3 16.387 0.000016 0.01638 1 0.000578 0.000021 ft3 28316.8 0.028317 28.317 1728 1 0.03704 yd3 764529.8 0.76453 764.53 46656 27 1 1 gal (US) = 3785.41 cm3 = 231 in3 = 0.83267 gal (UK) Weight Unit g kg t oz lb g 1 0.001 0.000001 0.03527 0.0022 kg 1000 1 0.001 35.273 2.20459 t 1000000 1000 1 35273 2204.59

oz 28.3495 0.02835 0.000028 1 0.0625 lb 453.592 0.45359 0.000454 16 1 1 ton (metric) = 1.1023 ton (US) = 0.9842 ton (UK) Pressure Unit kp/cm2 bar Pa=N/m2 kPa lbf/in2 lbf/ft2 kp/cm2 1 0.98067 98066.5 98.0665 14.2233 2048.16 bar 1.01972 1 100000 100 14.5037 2088.6 Pa=N/m2 0.00001 0.001 1 0.001 0.00015 0.02086 kPa 0.01020 0.01 1000 1 0.14504 20.886 lbf/in2 0.07032 0.0689 6894.76 6.89476 1 144 lbf/ft2 0.00047 0.00047 47.88028 0.04788 0.00694 1 kg/cm2 = 735.56 Dry (mmHg) = 0.96784 atm Unit explanations Unit abbreviation Newton meter Nm Kilopoundmeter kpm Kilopascal kPa Megapascal MPa Kilowatt kW kilojoule kJ British thermal unit Btu Calorie ca Approx. conversion SI unit Conversion factor Non SI Conversion factor SI Torque Nm x10.2 =kg/cm x0.8664 =lb in Nm x0.74 =lbf·ft x1.36 =Nm Nm x0.102 =kg/m x7.22 =lbft Pressure (Pa = N/m2) kPa x4.0 =in.H2O x0.249 =kPa kPa x0.30 =in.Hg x3.38 =kPa kPa x0.145 =psi x6.89 =kPa bar x14.5 =psi x0.069 =bar kp/cm2 x14.22 =psi x0.070 =kp/cm2 N/mm2 x145.04 =psi x0.069 =bar MPa x145 =psi x0.00689 =MPa Power (W = J/s) kW x1.36 =hp(cv) x0.736 =kW kW x1.34 =bhp x0.746 =kW kW x0.948 =Btu/s x1.055 =kW W x0.74 =ft·lb/s x1.36 =W Energy (J = Nm)

kJ x0.948 =Btu x1.055 =kJ Figure 1 J x0.239 =calorie x4.19 =J Speed and acceleration m/s2 x3.28 =ft/s2 x0.305 =m/s2 m/s x3.28 =ft/s x0.305 =m/s km/h x0.62 =mph x1.61 =km/h Horsepower/torque Bhp x5252 rpm= TQ (lb·ft) TQ x rpm 5252=bhp Temperature ºC =(ºF-32)/1.8 ºF =(ºC x1.8) +32 Flow factor l/min (dm3/min) x0.264 = US gal/min x3.785 =liter/min

Service Information Document Title: Function Group: Information Type: Date: Machine, transporting 050 Service Information 2014/3/6 0 Profile: CWL, L20B [GB] Machine, transporting Steering joint lock When transporting the machine on a trailer or by rail, the articulated steering joint must be locked with the steering lock. Figure 1 Steering joint lock Also, the machine must be lashed down to the loading surface of the transport vehicle so that it cannot tip over or roll away. Block the wheels with chocks. Figure 2 Lashing the machine Marker plate for lashing 1. 2. Fixing eyes on front frame Fixing eyes on rear frame (towing device) Lifting of machine

Volvo L20B Compact Wheel Loader Service Repair Manual

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